[conway maritime press] [anatomy of the ship] the battlecruiser hood (2010)

7/28/2019 [Conway Maritime Press] [Anatomy of the Ship] the Battlecruiser Hood (2010)

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ANATOMY OF TH E SHIP

The Battlecruiser


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ANATOMY OF T H E SHIP

JOHN ROBERTS


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I'llberts 1982dition John Roberts 200 I

in Great Britain in 1982 by\Iaril ime Press .. 1983 Cllld 1989I. ded iti on publ shed in 200 I by'vlaritim e Press.

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' Ived . No part of thi s publication may be rep roduced,I '\ 1 va l sys tem, or t ransmitted, in any form or by anyIlUnic, mechanical , photocopy ing, recording or other-

Ih 111\ th prior permi ss ion of the publisher.l77 t OOXII !lllnd in pa in by bookprint, S. L. , Ba rce lona


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c o N T E N T s

INTRODUCTION ............................ .. ...... 7 The DRAWINGS ..................................... 35Des ign ............ .................................... ........ 7 General A rrangements . .. .......................... 36Co nstruction ........ ..... ... .. ... .... ...................... 9 Hull Const ru ction ..... ............................... 50Se rvice Hi story ..... ... ................... .. .............. 9 Mac hinery ............ ........ ............................ 64The loss of Hood ... .. .. .. .. ............................. 9 Accommodati on ....................... ................ 82General arrangements and hull structure .. 10 Sup rstructure ................ .. ........................ 85M achin ery ................... .... ............. .. ...... .. ... 13 Rig ...................................... ... .... ...... ..... ... 92A rmament ............................ .. ................... 16 A rmament................................ .. ............ . 100Control sys tems . .. .................... ...... .. ......... 18 Fire-contro l. .... .. .. .. .... .. ............................. 109Ground tac kl e ...................... .... ...... .. ......... 20 Fittings .................. .. ........................ .. ...... 11 0A ircraft ... .. .... ........... ... .............................. 20 Ground tac kl e . .. .... .. .. ..... .. ....................... I 17M odifica ti ons .............. ......... .................... 20 Ship 's boa ts ... .. .................. .. ................... 120

A ircraft arrange ments ............................ 126The PHOTOGRAPHS ........................ .... 23


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A C K N OW L E

My thanks are due to Mr 0 K Brown, RCNC, Mr J Campbell andMr 0 Lyon for their help with information , and to Mr R A Burt forinvaluable assistance with photographs.

D G E M E N T S


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I N T R o DBetween the two World Wars the Royal Navy operated against abackground of financial restrictions , a strong campaign for navaldisarmament and a widely held belief that the battleship had beenmade obsolete by aircraft and submarines. This led the Admiralty tocourt public support by promoting its belief in the battlefleet, andemphasising the quality of its ships, men and equipment. Of theseships Hood , more than any other, lent herself to a public relationsexe rcise . Apart from the endless lists of amazing facts which couldalways be produced for a battle unit , she was the largest, fastest andone of th e most handsome capital ships in the world. Early in hercareer, being the newest and most prestigious ship of the fleet , she wasemployed on several international assignments as a representative ofthe British Empire , culminating in 'showing the flag' on a grand scalein the world cruise of 1923-24, and for most of her life she enjoyed theglamorous status of flagship of the battlecruiser force. Thus shebecame one of the major symbols of the Royal Navy, a position shewould no doubt have occupied without Admiralty help , and was heldin high regard by both the British public and the men of the Fleet towhom she was affectionately known as "the mighty 'ood" . Littlewonder that the news of her destruction in action with the Germanbattleship B ismarck in May 1941 was received with shocked disbeliefthroughout the country.

To the comparative few who knew the details ofHood' s design-the senior officers of the Admiralty and the Director of Naval Construction's (DNC) department - Hood's loss, although no less of ashock , was easier to understand . She had been unfortunate in beingdesigned during the First World War at a time when the lessons of thatwar, principally those learnt at the Battle of Jutland in 1916, had notbeen fully evaluated. Many changes were applied as the design andconstruction of the ship progressed but it was not until 1919-20, whenHood was completing, that some of the more important conclusionsregarding the lessons of the war were reached . Principal among thesewas the need for future capital ships to have horizontal protection ofarmour plate , instead of the built-up layers of protective platingpreviously employed, an alteration which could not be applied toHood, without enormous expense and delay, because of the advancedstate of her construction.Before the ship completed it was known that her protection wasnot up to modern standards and at several times in the followingtwenty years proposals were made for modernisations which were to

u c T I o Ninclude improved protection. However, other, older, ships were ingreater need and, with finance limited,Hood was placed well down thelist for improvement. She was eventually booked for a full reconstruction, to begin in 1942, bu t the outbreak of war ensured that it wasnever to take place and so she served her entire 21 years without majorimprovement despite her known defects; defects which, unlike herattributes, were not made public. I t must be said however, thatHood'sfaults were not the result of poor design but of unfortunate circumstance, lack of money and the inability to take advantage of improvements unthought of when she was designed. In fact the very inclusionof improvements after completion of the original design created several problems - principally a substantial loss in freeboard. By thestandards of 1915-17 she was an advanced ship and, as the postwardesigns which would have made her obsolete were never built, shecould claim considerable advantages over the majority of existingcapital ships for many years after her completion.

DESIGNIn 1914-15 the operations of the Grand Fleet under war conditionsrevealed a number of defects in the quality of its capital ships. Foremost among these was wetness caused by low freeboard, a situationmade worse in the newer vessels by the cutting back of the ships' sidesabove the upper deck to form embrasures for the secondary armament. The latter weapons also proved difficult to operate in heavy, oreven moderate, weather due to their close proximity to the waterline,and as the gunports could not be made completely water-t ight, theyeffectively reduced the ship's reserve of buoyancy. Ships were alsogoing to sea more heavily loaded than was normal in peacetime, whichnot only exacerbated all the above mentioned problems but addedsubstantially to the ships' draughts. This last wa s also regarded asserious because , in the event of damage to a ship's hull well belowwater , the force of water entering the ship, and hence the rapidity offlooding , would be that much greater.

From reports of these conditions it was decided that what wasrequired was a ship with a high, uninterrupted freeboard, a shallowdraught and a secondary armament mounted well above the waterline.To take advantage of these conclusions, the Admiralty asked andobtained Cabinet and Treasury sanction for the construction of anexperimental battleship, and in October 1915 the Director of Naval

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I N T R o DBetween the two World Wars the Royal Navy operated against abackground of financial restrictions, a strong campaign for navaldisarmament and a widely held belief that the battleship had beenmade obsolete by aircraft and submarines. This led the Admiralty tocourt public support by promoting its belief in the battlefleet, andemphasising the quality of its ships, men and equipment. Of theseships Hood, more than any other, lent herself to a public relationsexercise . Apart from the endless lists of amazing facts which couldalways be produced for a battle unit, she was the largest, fastest andone of the most handsome capital ships in the world. Early in hercareer, being the newest and most prestigious ship of the fleet, she wasemployed on several international assignments as a representative ofthe British Empire , culminating in 'showing the flag' on a grand scalein the world cruise of 1923-24, and for most o f her life she enjoyed theglamorous status of flagship of the battlecruiser force. Thus shebecame one of the major symbols of the Royal Navy , a position shewould no doubt have occupied without Admiralty help, and was heldin high regard by both the British public and the men o f the Fleet towhom she was affectionately known as "the mighty 'ood" . Littlewonder that the news of her destruction in action with the Germanbattleship Bismarck in May 1941 was received with shocked disbeliefthroughout the country.

To the comparat ive few who knew the details ofHood's design-the senior officers of the Admiralty and the Director of Naval Construction's (DNC) department - Hood's loss, although no less of ashock, was easier to understand. She had been unfortunate in beingdesigned during the First World War at a time when the lessons of thatwar, principally those learnt at the Battle of Jutland in 1916, had notbeen fully evaluated. Many changes were applied as the design andconstruction of the ship progressed but it was not until 1919-20, whenHood was completing, that some of the more important conclusionsregarding the lessons of the war were reached. Principal among thesewas the need for future capital ships to have horizontal protection ofarmour plate, instead of the built-up layers of protective platingpreviously employed, an alteration which could not be applied toHood, without enormous expense and delay, because of the advancedstate of her construction .Before the ship completed it was known that her protection wasnot up to modern standards and at several times in the followingtwenty years proposals were made for modernisations which were to

u c T I o Ninclude improved protection. However, other, older, ships were ingreater need and, with finance limited,Hood was placed well down thelist for improvement. She was eventually booked for a full reconstruction, to begin in 1942, bu t the outbreak of war ensured that it wasnever to take place and so she served her ent ire 21 years without majorimprovement despite her known defects; defects which, unlike herattributes , were not made public. It must be said however, thatHood'sfaults were not the result of poor design but of unfortunate circumstance, lack of money and the inability to take advantage of improvements unthought of when she was designed. In fact the very inclusionof improvements after completion of the original design created several problems - principally a substantial loss in freeboard. By thestandards of 1915-17 she was an advanced ship and, as the postwardesigns which would have made her obsolete were never built, shecould claim considerable advantages over the majority of existingcapital ships for many years after her completion.

DESIGNIn 1914-15 the operations of the Grand Fleet under war conditionsrevealed a number of defects in the quality of its capital ships. Foremost among these was wetness caused by low freeboard, a situationmade worse in the newer vessels by the cutting back of the ships' sidesabove the upper deck to form embrasures for the secondary armament. The latter weapons also proved difficult to operate in heavy, oreven moderate, weather due to their close proximity to the waterline,and as the gunports could not be made completely water-tight, theyeffectively reduced the ship's reserve of buoyancy. Ships were alsogoing to sea more heavily loaded than was normal in peacetime, whichnot only exacerbated all the above mentioned problems but addedsubstantially to the ships' draughts. This last was also regarded asserious because, in the event of damage to a ship's hull well belowwater, the force of water entering the ship, and hence the rapidity offlooding, would be that much greater.

From reports of these conditions it was decided that what wasrequired was a ship with a high, uninterrupted freeboard, a shallowdraught and a secondary armament mounted well above the waterline.To take advantage of these conclusions, the Admiralty asked andobtained Cabinet and Treasury sanction for the construction of anexperimental battleship, and in October 1915 the Di rector of Naval

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CONSTRUCTIONH ood's protection continued to be a source of debate and concernthroughout her period of construction and as a result still furtheradditions were made to her decks. In August 1918 it was approved todouble the thickness of magazine crowns to 2in by fitting additionall in protective plates; weight compensation being provided by omitting the lin and 2in splinter protection to the funnel uptakes above thefo recastle deck. In May 1919 it was approved to increase the thicknessof the flats above the slopes of the main deck to 3in in the vicinity of themagazines; compensation for the additional 100 tons being providedby omitting the four aftermost 5.5in guns (two on shelter deck, two onfo recastle deck) together with their dredger hoists .

Finally in Ju ly 1919 approval was given to increase the th icknessof the main deck over the magazines to 6in aft and Sin forward bu t thiswork was never carried out. However, compensation was provided forthe additional 440 tons by omitting the four forward, above-watertubes and reducing the thickness of the walls of the after torpedoconning tower from 6in to Hin. Despi te all these efforts to save weightthe inclining ofHood, at Rosyth on 21 Februa ry 1920, showed her tohave a load displacement of 42,670 tons, 1470 tons above her legenddisplacement of 1917. This increased the mean draught and reducedthe freeboard amidships by I ft but as the trim by the stern was greaterthan that specified in the legend the freeboard forward remained at29ft while the stem was 17ft from the waterline, 2ft lower thandesigned. At deep displacement she trimmed more forward loweringthe freeboard to 25ft 6in at the stem and to 15ft aft. Oddly enoughthese figures are close to those of earlier British ships bu t neverthelessthis low freeboard caused much greater problems of wetness, particularly aft where her quarterdeck was often awash - this deck at thebreak of the forecastle being about 6ft lower than the extreme ste rn. Itseems likely that this may have been due to her great length , combinedperhaps with her steadiness, causing her to cut through waves ratherthan ride over them as her shorter contemporaries might have done.Also, when running at speed, her stern tended to dig in , like that of adestroyer, thus increasing the chances of taking on green water aft.T his situation was to worsen for, while many older ships gained infreeboard when they were bulged, and were thus able to cope withsubstantial additional weights in later refits, the Hood steadilyincreased in displacement and reduced in freeboard as her careerprogressed.TheHood ran her steam trials in March 1920 (see Table 5) and onher measured mile full power trial achieved 32. 07kts with IS 1 280shp,5 per cent above her designed maximum power . However, in one ofher 3-hour full power trials she made just over her designed speed withjust over her designed maximum power. These and her gunnery andtorpedo trials proved highly satisfactory and after a final fitting outand inspection at Rosyth Dockyard she was accepted into RN serviceon IS May 1920. Hood entered service as a battlecruiser not a fastbattleship, perhaps reflecting the realisation that her protection was

not sufficient to justify this classification. However, the Admiralty doappear to have adopted a policy of defining the difference between thetypes by speed since the 'G3' battlecruisers, designed in 1921 bu tnever built, were far bette r protected than any existing battleship (thecontemporary 'N3' battleship design was better protected but wasarmoured against 18in rather than 16in shells) and when the earlydesigns for the King George V class were under consideration in the1930s the faster versions were initially classified as battlecruisers.Very little work was done on Hood's three sisters before, underthe pressure of work in the shipyards, they were suspended on 9March 1917. Being less far advanced than Hood various additionalmodifications were proposed for these ships including armoureddecks. However, with the end of the war and the consequent reduction in naval expenditure, plus the realisation that more advanceddesigns were possible, they were cancelled in October 1918 .

SERVICE HISTORY1 September 1916: Laid down22 August 1918: LaunchedJanuary 1920: Transferred to Rosyth for completion and trials14 May 1920: Inspected at Rosyth15 May 1920: Accepted from builders and commissioned15 May 1920 - November 1923: Flagship, Battlecruiser Squadron,Atlantic Fleet27 November 1923 - 29 September 1924: Flagship of Special ServiceSquadron (Repulse and First Light Cruiser Squadron) for world cruise- travelled 40,000 miles and was visited by over 700,000 peopleJanuary 1925 - January 1928: Flagship of Battlecruiser Squadron,Atlantic FleetJanuary 1928 - May 1929: Battlecruiser Squadron, Atlantic Fleet17 May 1929 - 12 May 1931: Major refit at Portsmouth12 May 1931- September 1936: Flagship of Battlecruiser Squadron,Home Fleet8 September 1936 - January 1939: Mediterranean Fleet (flagship ofVice Admiral Sir G Blake)February - August 1939: Refit at Portsmouth13 August 1939 - March 1940: Flagship of Battlecruiser Squadron,Home FleetMarch - May 1940: Refit at DevonportJune - August 1940: Flagship, Force 'H', based at GibraltarAugust 1940-May 1941: Flagship of Battlecruiser Squadron, HomeFleet24 May 1941: Sunk in action with Bismarck

THE LOSS OF HOODOn 23 May 1941 the Hood, flying the flag of Admiral Holland, andPrince of Wales were patrolling south west ofIceland when, at 1939, asignal was intercepted from the cruiser Suffolk reporting the German

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CONSTRUCTIONH ood's protection continued to be a source of debate and concernthroughout her period of construction and as a result still furtheradditions were made to her decks. In August 1918 it was approved todouble the thickness of magazine crowns to 2in by fitting additionallin protective plates; weight compensation being provided by omitting the lin and 2in splinter protection to the funnel uptakes above theforecastle deck. In May 1919 it was approved to increase the thicknessof the flats above the slopes of the main deck to 3in in the vicinity of themagazines; compensation for the additional 100 tons being providedby omitting the four aftermost 5.5in guns (two on shelter deck, two onforecastle deck) together with their dredger hoists.

Finally in July 1919 approval was given to increase the thicknessof the main deck over the magazines to 6in aft and Sin forward bu t thiswork was never carried out. However, compensation was provided forthe additional 440 tons by omitting the four forward, above-watertubes and reducing the thickness of the walls of the after torpedoconning tower from 6in to Hin. Despi te all these efforts to save weightthe inclining of Hood, at Rosyth on 21 Februa ry 1920, showed her tohave a load displacement of 42,670 tons, 1470 tons above her legenddisplacement of 1917. This increased the mean draught and reducedthe freeboard amidships by 1ft but as the trim by the stern was greaterthan that specified in the legend the freeboard forward remained at29ft while the stern was 17ft from the waterline, 2ft lower thandesigned. At deep displacement she trimmed more forward loweringthe freeboard to 25ft 6in at the stem and to 15ft aft. Oddly enoughthese figures are close to those of earlier British ships bu t neverthelessthis low freeboard caused much greater problems of wetness, particularly aft where her quarterdeck was often awash - this deck at thebreak of the forecastle being about 6ft lower than the extreme ste rn. I tseems likely that this may have been due to her great length, combinedperhaps with her steadiness, causing her to cut through waves ratherthan ride over them as her shorter contemporaries might have done.Also, when running at speed, her stern tended to dig in , like that of adestroyer, thus increasing the chances of taking on green water aft.T his situation was to worsen for, while many older ships gained infreeboard when they were bulged, and were thus able to cope withsubstantial additional weights in later refits, the Hood steadilyincreased in displacement and reduced in freeboard as her careerprogressed.TheHood ran her steam trials in March 1920 (see Table 5) and onher measured mile full power trial achieved 32. 07kts with IS 1 280shp,5 per cent above her designed maximum power. However, in one ofher 3-hour full power trials she made just over her designed speed withjust over her designed maximum power. These and her gunnery andtorpedo trials proved highly satisfactory and after a final fitting outand inspection at Rosyth Dockyard she was accepted into RN serviceon IS May 1920. Hood entered service as a battlecruiser not a fastbattleship, perhaps reflecting the realisation that her protection was

not sufficient to justify this classification. However, the Admiralty doappear to have adopted a policy of defining the difference between thetypes by speed since the 'G3' battlecruisers, designed in 1921 bu tnever built, were far bette r protected than any existing battleship ( thecontemporary 'N3' battleship design was better protected but wasarmoured against 18in rather than 16in shells) and when the earlydesigns for the King George V class were under consideration in the1930s the faster versions were initially classified as battlecruisers.Very little work was done on Hood's three sisters before, underthe pressure of work in the shipyards, they were suspended on 9March 1917. Being less far advanced than Hood various additionalmodifications were proposed for these ships including armoureddecks. However, with the end of the war and the consequent reduction in naval expenditure, plus the realisation that more advanceddesigns were possible, they were cancelled in October 1918.

SERVICE HISTORY1 September 1916: Laid down22 August 1918: LaunchedJanuary 1920: Transferred to Rosyth for completion and trials14 May 1920: Inspec ted at Rosyth15 May 1920: Accepted from builders and commissioned15 May 1920 - November 1923: Flagship , Battlecruiser Squadron,Atlantic Fleet27 November 1923 - 29 September 1924: Flagship of Special ServiceSquadron (Repulse and First Light Cruiser Squadron) for world cruise- travelled 40,000 miles and was visited by over 700,000 peopleJanuary 1925 - January 1928: Flagship of Battlecruiser Squadron,Atlantic FleetJanuary 1928 - May 1929: Battlecruiser Squadron, Atlantic Fleet17 May 1929 - 12 May 1931: Major refit at Portsmouth12 May 1931- September 1936: Flagship of Battlecruiser Squadron,Home Fleet8 September 1936 - January 1939: Mediterranean F leet (flagship ofVice Admiral Sir G Blake)February - August 1939: Refit at Portsmouth13 August 1939 - March 1940: Flagship of Battlecruiser Squadron,Home FleetMarch - May 1940: Refit at DevonportJune - August 1940: Flagship, Force 'H', based at GibraltarAugust 1940- May 1941: Flagship of Battlecruiser Squadron, HomeFleet24 May 1941: Sunk in action with Bismarck

THE LOSS OF HOODOn 23 May 1941 the Hood, flying the flag of Admiral Holland, andPrince of Wales were patrolling south west of Iceland when, a t 1939, asignal was intercepted from the cruiser Suffolk reporting the German

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Sailing boatsType Construction Length Beam Alg Oars Armament Weight Life Aemarkslexcludlng Iincluding Savingrubbers) 2 me n an d Capacityal l gear)42ft launch Double 42ft 11ft 6in Single 14 x 17ft Twin Lewis 198cwt 130 Hood carried one with an auxiliary moto

diagonal mast. 4 x 16ft MG throughout her lile and one with sail powDe Horsey (originally during 1923-29one MaximMG)36ft sailing Double 36ft 9ft 9, in Single 12 x 17ft Twin Lewis 110cwt 86 Replaced by 35ft motor boat by 1923pinnace diagonal mast. 4 x 16ft MGDe Horsey (origi nallyone MaximMG)32ft cutter Clinker 32ft 8 f t ~ i Single 8 x 15ft Twin Lewis 52cwt 59 Four carried until 1940, two thereafter . Tmast. 4 x 14ft MG employed as seaboats on davits with quDe Horsey (originally gear, or translerring at sea, lile saving, mor lug one Maxim etcsloop MG)30ft gig Double skin 30ft 5ft 10, in Two mast. 4 x 17ft 28cwt 26 Two carried (sometimes three) until 194carvel Dipping 2 x 16ft reduced to one. One was captain's and olug Admiral's personal boat27ft whaler Clinker 27ft 6ft Two mast. 4 x 17ft 26cwt 27 Two carried throughoutMontagu 1 x 16ft16ft dinghy Clinker 16ft 5ft 6in Single 2 x 14ft 14cwt 14 Two carried until 1939 when one replacemast. 2 x 10ft dinghyGunterMotorboatsTyp e Length Beam Speed BHP Armament Weight Life Aemarkslexcluding Iincluding Saving

rubbers) 2 men and Capacityal l gear)45ft motor 45ft 11ft 6in 8kts 36 Twin Lewis 250cwt 200 Carried from 1931 . Fitted with auxiliary slaunch MG35ft motor 35 ft 7ft8 in 8kts 33 Twin Lewis 106cwt 46 One fitted lrom completion, second addeboat MG and third in 1931. One replaced by 30ft Fremainder removed 1939. Fitted with vadesigns 01 canvas covers and cabins

Fast Motor BoatsType Length Beam Speed BHP Armament Weight Including Life Saving Aemarks

lexcluding 2 men and al l capacityrubbers) gear35ft last 35ft 8ft 6in 16-1 Bkls 130 lOOcwt 50 One fitted 1940 as Admiral's barge, two motorboat replaced steam boats in 194130ft last 30ft 7ft 9in 13-16kts 95 70cwt 35 One fitted 1934, removed c 1939motorboat25ft last 25ft 6ft 9in 12- 14kts 65 50cwt 21 Two fitted 1939--40motorboat16ft motor 16ft 5ft 6in 17-2 1kts 50 25cwt 7 Fast type, one fitteddi nghyNOTE: Motor boats had round bilge double diagonal hulls , ast motor boats were 01 hard chine construction.


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T H E H o T o G R A H s1. Hood in the final stages of fitting-out atJohn Brown's yard , Clydebank on 9 January1920. The wood stowed under the shelterdeck is deck planking for the after part of theforecastle deck. The boat stowage is a lm ostcomplete, only the 45ft Admiral' s barge and35ft motor boat are missing. The position ofthe inner 50ft steam pinnace and the 45ftbarge were exchanged shortly after

completion. Note the carley rafts awstowage, the loading platform on ththe 4in mounting, the night lifebuoydeck edge in the foreground , and thAdmiralty pattern kedge anchor stoagainst the bulkhead forward of theguns.John Brown

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2. Hood 's forward superstructure on 20January 1920.John Brown3. Hood on 9 January 1920, showingclearly the layout amidships Workmen areunshipping the midships platform of th eaccommodation ladder, which is laying onthe forecastle deck behind them. Justinboard of that is the tower of the midshipsofficer of quarters' hood , the forward hoodbeing at the she lter deck edge under the 3211cutter. The armoured doors of theabove-water torpedo tubes can be seenabreast the mainmast, and the blankeddoors for the pair which were removedduring construction, below theaccommodation ladder platform. The ship'sbalsa rafts, which were used when paintingthe ship's side, are stowed on the boilerroom vents abreast the after funnel. Note thetwo signal lockers inboard of the 5.5in gunon the she lter deck; th ese were moved to thesignal deck before or shortly aftercompletion.John Brown4. Hood shortly after completion in 1920,with the after concentrating position addedunder the after searchlight platform and themain topgallant mast housed down.Abrahams5. Hood in 1921 with a roof added to herraised compass platform and the maintopgallant mast raised .Gieves

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6. The port side of the shelter deck,looking forward from abaft the mainmast,prior to the world cruise of 1923. On theextreme right is a 4in ready-use locker andabove that one of the sighting ports of thenight defence position. The pipe running upthe mainmast strut is the diesel exhaust fromthe after diesel dynamo room. Note the OFboom projecting outward from between thefunnels , the 4in Mk III mounting on the leftand the ladderway to the forecastle deck.Cribb

7. The forecastle prior to 1923. In theimmediate foreground is the roof of thearmoured director hood, showing twoperiscopes (one circular, one rectangular)and beyond that the 30ft rangefinder andaircraft platforms on th e roof of '8 ' turret.Note the paravane derrick and ammunitionboom prepared for use on the port side andthe paravane houses behind the breakwater.Cribb

8. Hood 's bridge structure and fturrets viewed from the forecastle b1921 and 1924. Note the ship's badtompions of the 15in guns and the sbower and sheet anchor cable holdforeground .Courtesy R A Burt9. Hood in May 1929 shortly befirst major refit. The aircr.aft platformturret is rigged for flying - the runwanormally stowed on the turret roof, attached to the 15in gun barrels .Wright & Logan

10 10 . Hood viewed from astern in July 1931


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One of her 50ft steam pinnaces is alongsidetogether with a supply vessel.R Perkins11 . The Hood's quarterdeck in Jul y 1931showing the aircraft arrangements fittedduring her 1929-31 refit. The catapult isfolded, the nearest section being the forwarend folded back towards the stern, and theaircraft is a Fairey IIIF floatplane. Note theaviation fuel tank, mounted on ramps forjettisoning overboard when going into actionand the stern light and fog lamp on theensign staff stanchion.R Perkins12 . The ward room - a large, wellfurnished but hardly palatial compartment.Note the stove, and its funnel , on the left andthe arched opening to the ward room anteroom aft. This and the following internalviews of Hood were taken on 18 July 1932.Wright & Logan13 . Messes 18, 20, 22, 24 and 26 on theport side of the upper deck amidshipsimmediately abreast the aftermost funnelhatch . This view is taken from inboardlooking toward the port forward corner of theseamen's mess. Each table was regardedas a separate mess, two men beingassigned in strict daily rotation to co llect thefood from the galleys (in the containersshown on the tables) and to clean up. Aswith most armoured ships there was nonatural light for the men (except that fromhatches when open) as the side armourcould not be pierced. The electric lights fortWQof the messes can be seen adjacent totheir numbers against the ship's side, whichis almost invisible behind a wall of messracks and wooden ditty boxes (containingeach sailor's personal possessions). In thedistance against the athwartship bulkheadcan be seen a six compartment kit locker,and hanging from the deckhead, ventilationtrunks (with rectangular grills) , hooks forstowing the mess tables, and bars forslinging hammocks. Note also the fore andaft longitudinal girders - which in Hoodsupplanted the more usual transversebeams under the midships section of theforecastle deck - and two of their supportinpillars.Wright and Logan


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14 . The foremost Mk V above-watertorpedo tube on the starboard side with thereload torpedo suspended from theoverhead rails above it. Both the end of thetube and the head of the reload project intothe protective armoured box against theship's side. Beyond, another torpedo hasbeen split for servicing. the tail on the leh ,and the body on the right.Wright and Logan15 . The control platform of the forward.engine room, an obviously posed s hot as allthe pressure gauges are at zero. Thecylindrical object in front of the nearest m anis one of the feed water heaters.Wright and Logan

16 . The control platform of the forwengine room looking from port to starband showing the main steam andmanoeuvring valve control wheels. Indistance the ladder leads to a platformthe forward end of starboard wing lowpressure turbine , the spindles for its snozzles being just visible. When instathe turbines were fitted with insulatingjackets giving them a smooth cylindricappearance.Wright and Logan17 . Hood inJuly 1934 withO.5in MGmountings added abreast the conningthe 5.5in rangefinders removed and thpom-pom director positions at the aheof the foremast starfish Note the newparavane derrick rigged abreast 'A' tuand the swinging booms for the boatsR Perkins


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18 . The Hood in Grand Harbour, Malta inJune 1937 .Courtesy R A Burtas we ll as th e usual ventilation trunhammock bars; the pipe is a sa lt wThe two pillars support one of the


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19 . A close up of Hood 's superstructureas she leaves Portsmouth on completion ofher last prewar re fit in August 1939 .Wright and Logan20 The sick bay looking from amidshipsinto the starboard forward corner, with opendoors to th e surgeon's examining room , onthe extreme left , and to the operating room .Oil lamps as well as electric lights (which are'on' in this view) are hung from the deckhead

longitudinal girders under th e fo recdeck.Wright and Logan21 . Looking aft from the fore top showing all six of the 44in searchligin 1939, and four of her seven twinmountings.Courtesy R A Burt

22 . Hood 's bridge structure and forward


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turrets in April 1941 with the aerials of herType 284 gunnery radar set fitted to the aloftOCT. Note the UP mounting (covered withcanvas) on '8 ' turret, the absence of thesheet anchor cable holder, the hydrant forwashing down the anchors, with hosesconnec ted (just abaft the bollard in theforeg round) and the portable roller just to theright of the canvas cover over the forecastlehatch .Courtesy R ABurt23. The Hood at Scapa Flow shortlybefore her loss. The aerial of the partiallyfitted Type 279 radar is just visible at thehead of the mainmast in the originalphotograph.Courtesy R A Burt

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T H E D R A w I N G s


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A NOTE ON THE DRAWINGS

The ship drawings are based on Admiralty official draughts held by the NationalMaritime Museum, Greenwich. The general arrangements are drawn to a scaleof 1/600 (50ft = 1 n) , with the details drawn to multiples of that scale whereverpossible (ie 1/300, 1/150, 1/75, etc) . Scales are included in the headings to thekeys where applicable.

A General arrangements3 4- 5ISZ5J 6 9t=I 10 11L. __ -'~ - - - t 12LA General arrangements3 4- 5~ 6 91=1 10 11 12t : : ~ L


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13P- \'\.:..V

22C8J

14o 15

23

16

24~

17

25~ 26m,31 32 33 34 35~ - - ~ = = = = = ~ - - ~ - - ~ - - - - - ~ = = ~ - - ~ ~ ~ ( ) + -

KEY TO SYMBOLS ON GENERAL 19ARRANGEMENT DRAWINGS (all drawings In 20this section ara 11600 scale) 21221 Bollard 232 Fairlead 243 Ladder (up) 254 Ladder (down) 265 Water tank 278 Water tank (over) 287 Variable speed winch 298 Electric winch 309 Hawser reel 3110 Hawser reel (over) 3211 Awning stanchion 3312 Awning stanchion 3413 Mushroom top vent 3514 Vent (belOW upper deck only) 3615 Pillar 3716 Masts, mast struts and derrick posts 3817 Magazine cooling machinery 3918 Overhead rail 40

36

18 19 20 21CD

27~28CiI ', I, ', '~ - - :

36 37~ \=sJ

29

38~

Dwarf walls and coamingsScupperGuardrails

30, ' ,"jU.:

39-5.5in ammunition dredger hoist4in ammunition hoistEscape and access trunksElectric tiftAir loci ~':.:

36 37 38~ CSl ~

Dwarf walls and coamingsScupperGuardrails

30(r:'

39-5.51n ammunition dredger hoist4in ammunition hoistEscape and access trunksElectric iftAir lockVentilation trunkVentilation trunk (over)Ventilation fanVentilation heaterDoorSliding doorArched openingOpening (windows, hand-throughs , etc)Side scuttleHatchSkylightHatch with escape manhoieManholes, and manhoie type hatchesWash deck locker

~ ~~ /----A2/1 INTERNAL PROFILE1 Water-tight compartment2 Fresh water compartment3 Torpedo head magazine4 15ln shell room5 Shell bin8 5.5in magazine7 5.5in handing room8 Boiler room9 Fan compartment10 5.51n shell room11 15in transmitting station12 1Sin magazine13 1S1n handing room14 Pump room

15181718192021222324252827282930

/

/

,y ' ,/I/Submerged torpedo roomCapstan engine roomBoatswain 'S storeInflammable liquid storePaint storeCanvas roomCarpenter's storeCable lockerTorpedo 11ftRefridgerating machinery compartmentVegetable roomFlour storeMotor generator compartmentMedical distributing stationMain switchboard roomFan room

---- ,/ ''\

A1/1 EXTERNAL PROFILE (as completed1920)


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31 Gyro room32 Torpedo transmitting station33 Lower conning tower34 Paint store35 Torpedo body room36 Seamen 's mess37 Gunner's hydraulic gun-gear store38 Searchlight transmitting station39 5.5in ammunition working space40 Fire brick stowage41 WC s and urinals42 Shipwright's working space43 Sick bay44 Crew space45 Third W IT office46 Captain's office

47 Engineer's store 5948 Communication tube 6049 Intelligence office 6150 Bakery 6251 Signal distributing office 6352 Watch-keeper 's store 6453 Torpedo control tower 6554 Signal house 6655 Admiral's sea cabin 6756 WC 6857 Upper conning tower 6958 Admiral's exchange 70

717273747576n7879808182

Admiral 's tower 83 Marines' storeRevolving director hood 84 Torpedo control tower15in gun control tower 85 Searchlight control positionCaptain's sea cabin 86 Ward room galleyAdmiral's charthouse 87 Ward roomAdmiral's signal house 88 Admiral's dining cabinCharthouse 89 Admiral's day cabinTorpedo lookout 90 Ship's scullery15i n control top 91 Cooks' mess15in director tower 92 Boat hoist compartment5.5i n control top 93 Captain's day cabinCoppersmith's shop 94 Engine room fan compartmentBlacksmith 's shop 95 Enginesmith's shopWIT office 96 WIT officeShip 's galley 97 Central storeCooks' lobby 98 4in ammunition working spaceEngine room 99 Second W IT officeFeed tank 100 Gun roomThrust block recess 101 Admiral's storeDisinfector house 102 Gun room storeEngine room vent 103 Ward room wine storeSecondary battery room 104 4in HA magazineNight defence control position 105 Small arms magazineOilskin room 106 Carpenter's heavy store107 Steering compartment

A General arrangementsA2/2 SECTIONS 1 Engine room 21 Submerged torpedo room 41 Switchboard room

2 Boiler room 22 Illuminating gear store 42 Revolving hoo d Forecastle deck 3 Oil fuel filling compartment 23 Drain tank 43 15in gun control tower


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b Upper deck 4 15in handing room 24 Torpedo head magazine 44 5.5in gun control towerc Main deck 5 15in magazine 25 Meat room 45 Torpedo control towerd lower deck 6 151 n shell room 26 Sick bay 46 Signal distributing officee Platform deck 7 Oil fuel 27 Paravane house 47 Watch officer's cabinf Hold 8 Buoyancy space 28 Electrical store 48 Intelligence office9 S h e ~ e r deck 9 Water-tight compartment 29 'A' barbette 49 Gyro adjusting space and electricia10 Seamen 's heads 30 Isolation ward workshop

11 Paint room 31 Awning room 50 Third WIT office12 Paint store 32 Gunner's store 51 Issue room13 Inflammable liquid store 33 POs ' mess 52 5.5in ammunition working space14 Shipwright's working space 34 POS' pantry 53 5.5in transmitting station15 Cable locker 35 Seamen 's mess 54 Motor generator compartment16 Capstan engine room 36 CO. machinery compartment 55 15in transmitting station17 Surgeon's examining room 37 'B' barbette 56 Dynamo room18 Operating room 38 Provision room 57 5.5in shell room19 Torpedo body room 39 lubricating oil tank 58 5.5in magazine20 Refrigerating machinery room 40 Gunner's hydraulic gun -gea r store 59 Hydraulic engine room

IIL_.r----1 ____ ..II

81

38

60 Compass platform 80 Boi er fan space 100 Small arms magazine 120 Cabin61 Admiral 's charthouse 81 Reserve feed tank 101 4in HA magazine 121 Fresh water compartment62 Chief of Staff's sea cabin 82 Engine room vent 102 Engineers' store 122 Capstan engine room63 Admiral's sea cabin 83 Engine room fan compartment 103 Turbo-generator room 123 Carpenter's heavy gear store


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64 Navigating officer's cabin 84 Ward room pantry 104 Admiral's day cabin 124 Church and school65 Boiler room vent 85 Lobby 105 Captain's day cabin 125 Admiral's store66 Ammunition passage 86 CPOs' mess 106 WOs' bathroom 126 Steering compartment67 5.5in dredger hoist 87 Marines' mess 107 Gyro room 127 Ward room wine store68 CPOs' washing place 68 Armourer's workshop 108 Fire-control gear store69 Cable passage 89 Secretary's clerk's office 109 Pump room70 Air space 90 Gunner's ready-use store 110 Marines' office71 Hydraulic tank 91 Boat hoist machinery 111 Access and escape trunk72 Cooks' kitchen 92 Senior engineer's cabin 112 Second WIT office73 ERAs' pantry 93 Admiral's steward 113 Central store74 Boys' washplac& 94 Admiral's cook 114 Medical distributing station75 Stokers' washplace 95 Admiral's dining cabin 115 'Y' barbelle76 Electric lift 96 Captain's bathroom 116 WOs' storen WOs' galley 97 Ammunition working space 117 Searchlight gear store78 Dry canteen 98 WOs' mess 118 Electric cable stowage79 Canteen store 99 Shaft passage 119 Spirit room

@


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A3/3 A3/6 A3/7 A3/8 A3/9 A3/10 ~ A3/~ ~ * ~ ...... ,. 06 : I . .. ' - -_ -" A3/~ ( O ] ~ . -

~ - - - .... ": .' -''''-.A3/

l/

A3/5A3/14 A3/15 A3/16 A3/17

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A General arrangementsA3/19 UPPER DECK 27 sPas' mess 54 CPOs' mess

28 sPas' pantry 55 Ship's cooks' mess1 Water-tight compartment 29 Chief stoker's office 56 Admiral's stewards' and cooks' mess


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2 Seaman's WCs and urinals 30 Chaplain's office 57 Gun room and wa s ' stewards' and cooks' mess3 Magazine flooding cabinet 31 Issue room 58 Post office4 Crew space 32 pa s ' pantry 59 Boat hoist compartment5 Boiler room vent 33 Auxiliary coding office 60 Torpedo adjusting space (containing6 Engine room vent 34 Third W IT office above-water torpedo tubes)7 Top of cable lockers 35 Regulating petty officers' mess 61 Box around torpedo heads8 Hammock stowage 36 CPOs' and electricians ' mess 62 Ships' office9 W IT trunk 37 CPOs' and electricians' pantry 63 Telegraph office10 CPO's WCs and urinals 38 Engineers' store 64 Secretary's writers' office11 Shipwright's working space 39 ERAs' mess 65 Torpedo office12 Shipwright's ready-use store 40 Funnel hatch 66 Gunnery office13 Surgeon's examining room 41 ERAs' pantry 67 Printing office14 Operating room 42 Chief stokers' and mechanicians' mess 68 W IT officer's cabin15 Sick Bay 43 Chief stokers' and mechanicians' pantry 69 Senior engineer's ca bin16 Bathroom 44 Dry canteen 70 Cabin17 WC 45 Cooks' lobby 71 Chaplain's cabin18 Sick berth staff's mess 46 Bin for fire bricks (on slope of funnel hatch 72 Gun room pantry19 Dispensary casing) 73 Gun room20 Torpedo embarkation hatch 47 Signal tube, port and starboard 74 Captain's office21 Ablution compartment 48 Food lift 75 Confidential book store22 Canteen staff's mess 49 Sergeants of Marines' mess 76 Captain's bathroom23 Isolation ward 50 Ship's scullery 77 Captain's sleeping cabin24 PO's mess 51 Master at Arms' and secretary's writers' 78 Communication tube25 Gunner's hydraulic gun-gear store mess 79 Captain's pantry26 Barber's shop 51 Police office 80 Captain's day cabin

53 Ward room stewards' and cooks' mess

A3/19

..

A3/20

59 5756

60 58

A3 /20 MAIN DECK 27 Stokers' dressing room 54 Electrical articifers' workshop28 Seamen's washplace 55 Electrical articifers' ready-use store1 Water-tight compartment 29 Boys' washplace 56 Engineers' office

2 Seamen's mess 30 Signal station 57 Captain's steward's cabin


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3 Funnel hatch 31 SPOs' washplace 58 Ward room steward's cabin4 Boiler room vent 32 SPOs ' dressing room 59 Admiral's steward's cabin5 Engine room vent 33 Stokers' urinals 60 Admiral's cook's cabin6 Engine room vent fan compartment 34 Chief stokers' and mechanics' wash place 61 Engineers' ready-use store7 Warrant officer's cabi n (single and double) 35 Chief stokers' and mechanics' dressing 62 WIT store8 Officer 's cab in room 63 Commissioned officers' bathroom9 Lobby 36 ERAs' wash place 64 Commander's bathroom10 Paint room 37 ERAs' dressing room 65 WOs' pantry11 Clothing issue room 38 Coal bunker 66 WOs ' mess12 Lamp room 39 Canteen store 67 WOs' bathroom13 Cable locker 40 Cells 68 WOs' urinals and WCs14 Torpedo body lift 41 Sentry walk 69 4in ammunition working space15 Torpedo body room 42 Band instrument room 70 Magazine flooding cabinet16 Diving gear store 43 Armourer's workshop 71 W IT trunk17 Awning room 44 Enginesmiths ' shop 72 Church18 Gunner's hydraulic gun-gear store 45 Auxiliary spare gear store 73 Midshipman's study19 Searchlight transmitting station 46 Coding office20 5.5in ammunition working space 47 W IT office21 Ammunition passage 48 Central store22 Stokers' dressing room 49 Engineers' workshop23 Stokers' washplace 50 Subordinate officers' bathroom24 POs' washplace 51 Subordinate officers' dressing room25 CPOs' wash place 52 Secondary light store26 Marines' washplace 53 Midshipmen's chest room

A General arrangementsA3/21 LOWER DECK 29 Telephone exchange

30 Main switchboard room1 Water-tight compartment 31 Flour store2 Fan compartment 32 Spare armature room

55 Paymaster's store56 Gunner's s tore57 Medical distributing station58 Medical store


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3 Feed tank 33 lP switchboard room4 Thrust block recess 34 Gyro room5 HydrauUc engine room 35 lower conning tower6 Hydraulic tank 36 Torpedo transmitting room7 Engine room 37 5.5in transmitting room6 Oil fuel filling compartment 38 Magazine cooler compartment9 lobby 39 Marines' store10 Paint store 40 'A' boiler room11 Canvas Room 41 'B' boiler room12 Carpenters ' store 42 'X' boiler room13 Fresh water compartment 43 'Y' boiler room14 Pump room 44 Electric lead and hydraulic pipe tunnel15 Cable locker 45 Boiler room fan compartment16 Flour store 46 Engineers' store17 Sand and lime store 47 Diesel dynamo room (upper sect ion - flat at18 Painted canvas room platform deck level)19 Torpedo lift 48 Turbo-generator room (upper section - flat20 Provision room at platform deck level)21 Vegetable room 49 Central store22 Meat room 50 Fire-control gear store23 Refrigeration machinery compartment 51 Second WIT office24 Gunners' store 52 Chart and chronometer room25 Medical distributing station 53 Officers' bedding26 CO. machinery compartment 54 Voice pipe store27 Stowage for whips, etc28 Motor generator compartment

A3/21

A3/22

59 Warrant officers' store60 Searchlight gear store61 Capstan motor compartment62 Captain's store63 Admiral 's store64 Gun room store65 Ward room store66 Ward room wine store

;-- - 4.

..

---1- - - - - -

2.

, ,.

A3/22 PLATFORM DECK1 Water-tight compartment2 15in magazine3 15in handing room

2528272829

'B' boiler room'X' boiler room'Y' boiler roomReciprocating dynamo roomTurbine lubricating 011


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,r

i

4 Steering compartment5 15in cordite cases8 Buoyancy space7 Oil fuel8 Engine room9 Air space10 Inflammable liquid store11 Boatswain's store12 Capstan engine room13 Submerged torpedo room14 Flour store15 Pump compartment18 Provision room17 Gunner's store18 Engineers' store19 Turbo-generator compartment20 Diesel dynamo room21 15in transmitting station22 Blank and saluting magazine23 Silent cabinet24 'A' boiler room

') 28

2.

IE.... ill- -4 5 +-""_ 1--_ ill

303132333435383738394041424344454647484950

45 - 4-1

Thrust block recessRape seed oilSettling tankMinerai oilHydraulic tank50 ton pump platformSmall arms magazineHydraulic engine roomCarpenter's heavy gear storeShaft passage5.5in handing room5.5in magazineShipwright's storeSecondary lighting storeGunslght storePaymaster's storeMarines' storeDry guncotton magazineSpirit roomSteering gear - drive from engine roomPalm compartment

A General arrangementsA3/23 LOWER PLATFORMS A3/24 HOLD123

5.5in shell roomAir spaceHand-up123

Water-tight compartment15in shell roomProvision room

A3/25 DOUBLE BOTTOM1 Fresh water tank2 Buoyancy space3 Oil fuel (including additional tanks fitted


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4

46

4in HA magazine 45678910111213141516171819202122232425282728293031

Buoyancy spaceAir spaceShell binsOil fuelEngine roomAir spaceTorpedo head magazineMining storeIlluminating gear storeTorpedo gunner's storeElectrical storeGunner's storeEngi nears' storeHydraulic engine roomHydraulic tankFresh water tankDrain tank'A' boiler room'B' boiler room'X' boiler room'Y' boiler room5.5in handing room5.5in magazineFeed tankThrust block recessCentral storeShalt passage5.5in shell room

1929-31)4 Reserve feed water5 Overflow feed water

A 3 / 2 3 - f t $ ~ 4-1

A3/25


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A3/23

20

o -- - ...---o ... " ". .. 20

A General arrangementsA4 EXTERNAL PROFILE AND PLAN (a . In

May 1941)


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1) 000 0000

48

1) 1) 1) 1) 0 , 0


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- 0 00 0o o o o ~

BB1

12

Hull constructionSTEEL SECTIONS EMPLOYED IN SHIPCONSTRUCTIONAngle barTee bar

81


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345678

B21234567

B3123

B4

ABCDEFG12345678910111213141516

B51234567

Zed barChannel bar'I' (or 'H') barAngle bulbTee bulbB u i ~ - u p 'I' girder

STEEL PLATE RIVETED JOINTS(note: caulklng arrowed)Lap joint (double riveted)Single strapped joint (double riveted)Joggled lap joint (treble riveted)Double strapped joint (single riveted)Double strapped tee bulb (also employedas single strapped, and on angle bulb)Angle strapped joint between longitudinalgirder and transverse beamAngle bar joint

TYPES OF TRANSVERSE FRAMELightened plate frameWater-tight (or oil-tight) frameBracket frame

TYPES OF LONGITUDINALS ANDSTRINGERSVertical keel outside double bottomWater-tight longitudinalNon water-tight longitudinalOil-tight longitudinalLongitudinal over docking keelStringer, fore and aftStringer in bulge structureLimber holesLightening holeDrain holeButt strapLap jointLinerAngle connection to water-tight frameAngle connection to oil-tight frameAngle connection to bracket frameAngle strapAir escapeZed frameChannel frameIntercostal angle barContinuous angle barStringer plate

BOX KEEL (amidships)4in x 4in angle barDouble strap, over joint'/,in inner bottom plate1 n inner flat keel plate'/,in vertical keel1 n outer flat keel plateAngle bar connections

82

B6

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L TL J I 1 T2

2

43

~ ~SECTION OF DOUBLE BOTTOM(showing change from box keel to singlekeel forward and aft)Box keelCompensat ing linerDouble strap, over jointSingle keelWater-tight frameBracket framesFirst longitudinalLightened plate framesLap joint

3 4 5 6 7

83

1

2

8

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84 3

A ,-,','""


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B

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B Hull constructionB7 MIDSHIPS HULL STRUCTURE1 Forecastle deck2 Upper deck3 Main deck (protective deck)4 Lower deck


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5 S h e ~ e r deck6 Frames7 Intermediate frames (behind armour only)8 Sin armour9 7in armour10 12in armour11 Outer bottom plating12 Longitudinal stringers13 Water-tight bulge compartment14 Torpedo bulkhead15 Buoyancy space (filled with tubes - notshown)16 Oil-fuel compartment17 Air space18 Lightened plate frame19 Bracket frame20 Longitudinal frames21 Box keel22 Inner bottom plating23 Ammunition passage24 Beams25 Funnel hatch coamings26 Boiler room vent27 Wood deck planking28 Longitudinal beams

B8 FORWARD HULL STRUCTURE1 Forecastle deck2 Upper deck3 Main deck4 Side plating5 Lower deck6 Platform deck7 Hold8 Side stringer9 Frame brackets10 Side stringer11 Boundary angle to deck12 Longitudinal13 Inner flat keel plate14 Outer flat keel plate15 Pillar16 Zed bar frames17 deck beams18 Deck planking19 Longitudinal girder20 Vertical keel plate

B9/1 BOW STRUCTURE1 Contour plate 16 Vertical keel 3 Main deck2 Stem casting 17 Frames of 'zed' bar 4 Lower deck3 Keel plates 18 Bulkhead 5 Platform deck4 Web frames 19 Longitudinal stringers 6 Breast hook5 Deep beams 20 Outer bottom plating 7 Vertical keel6 Fairleads 21 Sheer strake 8 Stem casting7 Hawsepipes 22 Boundary angles 9 Contour plate8 Forecastle deck 23 Transverse beams of angle bulb 10 Paravane fairlead9 Upper deck 24 Longitudinal 'I' girder beams 11 Inner flat keel10 Main deck 12 Outer flat keel11 Lower deck B9/2 ARRANGEMENTOF STEM (1/150 scale, 13 Outer bottom plating12 Platform deck except sections which are 1175) 14 Lug13 Hold flat 15 Boundary angle14 Breasthook 1 Forecastle deck15 Floor plate frame- 2 Upper deck

19 8

89/1


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89/2

1

10 18A B {;gJl W. . 5 ' ~' .. - : - - r - ~ - ... " : 2 .12 12 148 8 8 9

A-A B-B C-c D-D

B Hull construction2 810/1 B10/1 STERN STRUCTURE

1234

QuarterdeckHawsepipeStern castingsMidshipmen's study


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5678910111213141516171819202122

Lobby (main deck)CabinsPortable plate (for lifting rudder)Water-tight bulkheadZed bar framesInner flat keelOuter flat keelVertical keelStarboard inner shaft 'A' bracketPalmRudder bearingsScarphSteering compartment (platform deckStore rooms (lower deck)Water-tight compartmentPalm compartmentFloor plate framesWeb frames

810 / 2 DETAILS OF STERN CASTINGS(11150 scale, except sections A-A 0- 0 which are 1175)1 Upper deck2 Main deck3 Hawsepipe (lower section-formed incasting)4 Lug on casting for connection of decplating5 Land for connection of side plating6 Stern castings7 Centre-line web on casting8 Outer bottom plating9 Water-tight bulkheads10 Scarph (also provides lug for connectiprotective deck)11 Portabl e plate for access to ruddercrosshead12 Lower (protective) deck13 Frame14 Webs on casting for connection of fra15 Scarph between forward and middlecastings16 Upper rudder bearing17 Lower rudder bearing18 Hardened steel pintle19 Lower palms of after 'A' bracket scarand riveted to casting rabbet20 Flat keel plates21 Vertical keel plate22 Platform deck23 Inner flat keel24 Outer flat keel

B11/1 OUTER BOTTOM PLATING AT END(typical arrangement. 1/150 scale)1 Longitudinals2 Vertical keel3 I nner keel plate4 Outer keel plate5 Garboard strake6 Frame lines

7 Stealers (strakes arranged to double w

810/2 D-D

B-B


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616 19 6

2

911 12

9

1016

811/1

24

B Hull construction811/2 OUTER 80TTOM PLATING AMIDSHIPS 811/2(11150 scale. Note: all strakes of flat

bottom amidships, Including Inner andouter keel and docking keel plates wereof li n thlckneaa)

1 Fi rst Longltu dinal


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2 Second longitudinal3 Third longitudinal4 Fourth longitudinal (docking keel)5 Fifth longltudinal6 Torpedo bulkhead7 Vertical keels8 Inner keel plate9 Outer keel plate10 Garboard strake (sunk)11 Strakes (lettered A, B, C from garboard 15outwards)12 Frames13 Water- andlor oil-tight frames be lowwater-tight bulkheads14 Triple riveted butt straps joining plate ends15 Liners under water-/oi l-tight frames

811 /3 INNER 80TTOM PLATING ('Y' boilerroom . 1/150 scale)1 First longitudinal2 Second longitudinal3 Third longitudinal4 Fourth longitudinal (bulkhead to oil fuelcompartment) 14 125 Fifth longitudinal6 Torpedo bulkhead (Hi n thick, lin + lin)7 Vertical keels8 Upper keel plate 199 Inner bottom plating10 Lap joints (double riveted)11 Frames 811/312 Main bulkhead between X and Y boiler

rooms13 Main bulkhead between Y' boiler room andforward engine room14 Air space15 Oi l fuel compartment16 Engineer's store17 Access manholes to double bottom18 Boundary angles19 T bar frames (12in x 6in x 6in) to torpedobulkhead20 Bulkhead stiffening bars 921 Compensating liners

812/1 LAPPED DECK PLATING (11150 scale)1 Beams2 Butt straps (under)3 Plating overlapped and riveted ~81212 FLUSH DECK PLATING (11150 scale)1 Beams2 Butt straps (under)3 Edge strips (under)

10

B12/2 81213 FORECASTLE DECK PLATlNG(amldahlp" 1/150 acale, excepdllil of rtvetlng . . 117S)

1 Funnel hatch2 Boiler room vent3 Engine room vent


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3

2

3

2 IB12/1 \\

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,B12/4 {I I7 Ii!

1112

812/3

4 5.51n gun positions5 Longitudinal girders8 Beams7 Brackets (under)8 Pillars (under)9 Butt straps (under)10 Butt straps (over)11 Lower thickness of deck plating12 Upper thickness of deck plating13 Bulkhead (under)14 Coal scuttle15 Stringer plate

81214 SECTlON OF EXPANSION JOI(ahel .. . deck)

12345

RivetCover plateShelter deck platingWaterwaySiffening angle

I"- / ~I, ' - . /V ~ I : I i / ~ tll i n, - l i -iT 1 I rrl T,i \ ! T 1I ', t II II:< T l , ~ - I-- ! -- - - :- =t= l- I----- - - l..----- I - - - --r-- ---- r -.....-' r- t - -i IT , I ItI '" I i ; ilfl iltli I ,I ' I I, I i i i lII II ," I

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- ; )ifnrrr- 1 Tn r t I . ~ In -;(1 \I I 'f I II ( ~ i" I i \ I l 14 )\ III it ,il{ I .: I (i I I' ...", 1 ~ 1I i " I I [\1 I' i 1 :rI' 1 ~I I 1, 1 i I )_1i L II I i I : iII\ \V \ \ 1 \ ')3

B Hull constructionBl215 FORECASTLE DECK, PLATING ATSTEM (Inset shows typical arrangement

of stealer plate oint the arrangementofatealers In the outer bottom was similar.The arrangement of deck plating, atends, on the other decks was similarexcept thallhese were butt riveted, to be

B14/1 BODY PLAN (11150 scale)A Line of forecastle deck at sideB Line of upper deck at sideC Line of main deck at sideFP Forward perpendicularAP After perpendicular

B12/5

6


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flush, and not lap riveted)1 Slringer plale B14/2 DETAIL OF BILGE KEEL2 Openings for hawsepipes3 Pillar (under)4 Longitudinal girders (under)5 Beams6 Plate cut away to allow raised plate to passunder stiffening piece7 Stringer plate

Bl216 DECK BEAMS AND BRACKETS1 Typical form above forecastle deck level2 Typical form behind armour on main deck3 Typical form behind armour on upper deck4 Modified form of (3) with bracket lengthenedto reach second longitu'di nal girder5 Typical form outside armqur and on internalbulkhead etc6 Connection of han beam to barbette armour

( b o ~ e d )7 Connection of half beam to hatch coaminga Angle bulb deck beamb Zed bar or angle bar framec Angle connection between bulkhead anddeckd Bracket (mostly constructed of lin thickplate)e Angle bulb deck beam (9in x31in x lin thick)f Channel bar frame (9in x 31in x 3!in x 'I,inthick)g Longitudinal T bar (12in x 6in x 6in x 1inthick)h Angle connection to forecastle deck (Bin xBin x ' I,in thick)I CoamingI Angle bark Deck plateI Angle strap connection (both sides)m Barbetten Armour boHs

B13 MAIN WATERTIGHT BULKHEADBETWEEN 'X' AND 'Y' BOILER ROOMS(nole: arrangement of atlffeners variesfrom bulkhead 10 bulkhead. 1/150 scale)

123456789

'I' girder stiffenerAngle bar stiffenerLongitudinal bulkheadBracketsSupport brackets in double bottomLevel of main deckBoundary angleBulkhead plating joggle lap jOintedLiner

B12/6

k

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4813


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9

5

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18

4

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814/1

B Hull construction815


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60

B15 MIDSHIPS STRUCTURE (at forward 17 Web Frame B16 ARMOUR LAYOUT (1/1200 scale)engine room) 18 Bulkhead19 Crushing tubes Numbers give armour and protective plating1 Wood deck planking 20 Outer bottom plating thicknesses in inches. The larger numbers on the2 Forecastle deck plating (double thickness) 21 Stringers in bulge compartments deck plans refer to the deck plating thickness - the3 Longitudinal 'I' girders 22 Protective longitudinal bulkhead (double double figures on the main deck refer to the4 Brackets thickness) thickness on the flat and slope of the deck5 Transverse beams 23 Skin plating behind armour (double respectively (ie 3+2 = 3in on lIat. 2in on slope).6 Corticene deck covering (living spaces thickness) The station numbers on the external profile line up


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only) 24 Wood backing with those on the body plan.The numbers along the7 Upper deck plating 25 Edge strips keel line of the internal profile are the station8 Main (protective) deck plating (double 26 Sin armour numbers of the main water-tight bulkheads.thickness) 27 7in armour9 Flat over slope of protective deck 28 12in armour A Forecastle deck10 Longitudinal girders 29 3in armour (boiler rooms only - B Upper deck11 Inner bottom protective plating beyond) C Main deck12 Double bottom 30 Armour s h e ~ D Lower deck13 Box keel 31 Bilge keel14 Docking keel 32 Sheer strake15 Ammunition passage 33 Stringer plates16 F r a m e ~

o-} Z

' -5

117 116 110 Is 15 I., ,."~ .. p c ~

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567891011121314

B18

12345678

Flat over slope of protective deckDeck beams (9in x 3!in angle bulb)Upper deck plating (lin)Frames (9in x 3! in x 3!in channel)Side plating behind armour (1 in + 1 n)Forecastle deck plating (Hin + lin)Angle bar connectionsMain framesIntermediate frames3in armourLONGITUDINAL HOLDING BULKHEAD(at bottom. 1/150 scale)Inner thickness of bulkhead' platingOuter thickness of bulkhead platingEdge strips (outboard)Edge strips (inboard)T girder framing, behind bulkheadDouble bottomBoundary angleFrames

B19/1 BARBETTE STRUCTURE ('A ' turrat)1 Roller path seating2 Training rack seating3 4in armour bulkhead (forecastle tomaindeck)4 12in barbette armour5 6in barbette armour6 Sin barbette armour7 1Din barbette armour8 Sin barbette armour9 4lin armour flat between armouredbulkheads1011121314-1516171819202122232425262728

62

Sin armour bulkheadForecastle deckUpper deckMain deckLower deckPlatform deckGunner's storeMedical distributing stationMagazineShell binShell room flatHoldShell roomHoist wellWater-tight coamingHanding roomOil fuel filling compartmentHoist trunk tubeRing bulkhead

567891011121314151617181920

Training rackLower roller pathBin x Sin continuous angle barVertical zed frame (Sin x3in x3in) conti nousVertical zed frame (Sin x 3in x 3in)continuousRing bulkhead (1 'I.in thick plating)'/.i n thick continuous facing strip (bothsides)Horizontal zed frames (Sin x 3in x 3in)intercostalFlanged bracketsBin x Bin continuous angle bar (both sides)Angle bar connection to flatHorizontal zed frames (7in x 3!in x 3!i n)intercostalli n thick plating behind armourli n thick continuous facing stripBarbette armourVertical zed frame support to armour

6

12 13

3

818

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4

B19/1


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819/2

1617'--- *,",

18'- - - - Ic rn l19-----+t-'20

111

15

C Machinery

C1/1


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C MachineryC2/2


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8

- \-- -1 1

66


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C7/3 5


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C7/4

C MachineryC8/1 C8/4


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5

2C8/2

9

4

5

8 6

5

C8/3

70

3

3C8/S

19

67

8

9

5

4

6

89


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acnmeryC9/2 WEIR VER TI CAL EVA POR AT OR(sh ow nwith cover doorop en )1 Evapo rator she ll2 Gener ate d steam outlet valv e3 Gau ge 4 Sa fety valve5 Safe ty val ve outlet6 To p conne ction to wa ter level gau ge(hidde n on far side)7 Sw ingin g bar for door

9 HP turbin e10 LP turbine 11 Oil to bea rin gs 12 Oil to ge ar sp rayers

C11/1-C 1117GEN ERAL ARRA NG EME NT OFPRO PE LLER SHAF TS (s ta rbo ar d sid e.All11300 s ca le )

C12/1 FIR E AN D BILG E PU MP 1 Stea m cy linder 2 Air vessel3 Sli de va lve ches t4 Stea m pipe5 Fire main sc rew lift valve6 Fire main7 Sc rew lift valv e with hose con ne ction8 Scre w lift va lve to pump disc ha rge


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8 Door9 Evapora ti ng tube hea ting coils10 Han d clea ning door11 Drain va lve from coil12 Blo wdown disch arge to sea13 Brine va lve 14 Inl et steam he ad er15 Steam in let valve to co ils 16 Inlet steam pres sure ga ug eC10 FO RCE D LU BR IC AT ION SY STEM FOR TUR BINE S (m id d le enginero om . 1/300sca le )1 Turbine oil gravity tank 2 Oil drain tank 3 Fo rced lub ricat ion pump s4 Oil coo lers5 Su pp ly pip es8 Return pip es (brok en line)7 Th rus t b loc k (oil to be ari ng and pads)8 Gea r case

C9/2

72

1 Thru st blo ck2 Sh aft coupl i ng3 Plu mme r bloc ks4 Ster n tube 5 Sh aft bra cket6 Trun k access to sha ft passag e7 Bri dg e over shaft8 Thrust blo ck recess in afte r eng ine room9 Sh af t locki ng ge ar10 Platform for 50 ton pump 'H '11 Hy drau lic eng ine room12 Hy drau lic tan k13 Oil fuel tanks14 Pi llar s (su ppo rting tur bo -ge ne ra tor )15 Palm s of sh aft bra ckets 16 Arc he d op enings 17 Hatc h (overh ead)18 Pla tfo rmon inbo ard side of shafts

C10

9 Pu mp cylinde r10 Pum p valve ches t11 Suction va lve s ,one to sea , one to bilge 12 Valve box13 Mud box14 Bilg e water strain er15 Access cover (fo r cleanin g pipe)16 Cas t ironcorro sio n join t17 Screw down valve18 Flood valv e (note:op era ting s pindlehas nohan dle)19 Sea inlet20 Discha rge to sea21 Non -re tur n valve from wa ter pump dis cha rge22 Non - return valv e from fire and bilge pu mpdis charge 23 Screw down non -ret urn valve with hose con ne ction 24 Floo din g pip e25 Do ub le bottom

C12/1

C11 /1-C11/7


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I I L

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6 6 I IX 11b.lJL 7 16 110~~ LL!--J I I I I I I ill )l. J L -.blJ:Q A2 ~ J I -Ir - J.. '\ ~ ::?a< ----- -- !-----U \ -C . ---I I I I I I I i l: t-:::b-d::- 1LA LB Lc Lo LE

C Machinery 4C12/2 C13/2

21 7

20


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- -- - --;jb--t=1I ..... 193 C13/1 9C12/3

C13/4

1-7-

74


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C Machinery24

19

1920


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5 11-d-25

@2

C14/2

51 C14/3

5176


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C Machinery

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C15

C17

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C MachineryC22/1 C22/2 I C22/3I

112 12

~


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2M(:6 18~3 2

C22/4C22/6 C22/S

15 I ~ C22/7 C22/8

21C24

/ .....I '

1 2 3 4 580

cn/1 PROFILE OF 'Y' BOILER ROOM ANDFORWARD ENGINE ROOM (note: thiskey applies to all C22 drawings, whichare 11300 seele)1 Engine room supply trunk2 Engine room exhaust trunk3 Forward engine room4 'Y' boiler room5 40in fandriven by electric motor (note otherengine rooms 30in)6 50in fan driven by electric motor

8 Distribution trunk9 Hinged baffles within trunk to regulatesupply10 Air chamber11 Exhaust vent12 Supply vent13 Remote control handwheels for shut-offvalves in ventilation trunks passing throughdecks and bulkheads below

C24 WEATHER DECK VENT TOPS (1175


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7 35in fan driven by electric motor8 Hatches to engine room9 Engine room vents for natural supply10 Funnel hatch (armour gratings)11 Boiler room supply vent (armour gratings)12 Hinged armour grating for access13 Vent trunk for supplying warm air fromfunnel casing to fan flat14 12!tn ventilation fan15 Ladder16 Vents17 Air-tight doors18 Air lock19 Electric lift20 Electric lift motor21 90in supply fans driven by steam

reciprocating enginesC22/2 SECTION AT EXHAUST FANS OF AFTERENGINE ROOM (note: exhaust fans ofafter and middle engine rooms are

smaller han those ofthe forward engl neroom)

C22/3 SECTION AT SUPPLY FANS OFFORWARD ENGINE ROOMS (note:forward engine room has three supplyfans, other two engine rooms have two)

C22/4 PLAN OF MAIN DECK OVER 'Y ' BOILERROOM AND FORWARD ENGINE ROOM

C22/5 PLAN OF BOILER ROOM FAN FLAT

C22/6 SECTION OF BOILER ROOMVENTILATION SYSTEM

C2217 90ln BOILER ROOM VENTILATION FAN,DRIVEN BY STEAM RECIPROCATINGENGINE

C22/8 ENGINE ROOM SUPPLY FAN DRIVENBY ELECTRIC MOTOR

C23 TYPICAL VENTILATIONARRANGEMENTS FOR MESS DECKS,STORE ROOMS, ETC1 Mushroom top supply2 Mushroom top natural exhaust vent3 Supply trunk4 1nl n ventilation fan5 Heater6 Steam pipes to heater7 Shut-off valve

scale)1 Mushroom top vent2 & 3 Vent trunks as fitted against superstructureand barbettes4 Vent opening on forecastle deck to capstanmachinery compartment5 Vent trunk with modified tops as fittedagainst 'X' barbette during 1925-26 refit6 Drain holes

C23

1

.-.-t--- - 11

12-+-- -.....-'

D Accommodation01 TYPICAL CREW SPACE (upper dec

port side, abreast '8 ' barbette and11150 scale)Magazine flooding cabinetWash deck lockerVentilation fanKit lockerMushroom top exhaust vent (over)Mushroom top supply vent (over)Vent trunkMess stools


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D1

D2

13 .....___23~12-

11/

1cY

9/

121314151617181920212223242526272829

Mess tableHammock stowageVent, access and escape trunk to hydraengine roomVent, access and escape trunk toturbo-generator roomVent to turbo-generator roomHeaterMess rackArched openingPositions for slinging hammocksHatch (over)PillarsEscape manhole (over)Hatch to oil fuel working spaceSliding door25 gallon issue tankWire mesh doorSPOs' pantrySPOs' messBarbers' shopWash basinsBarber's chairs


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D Accommodation15 16 17


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05

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TYPICAL MESS (note: most of the mess 12tables were longer than that Illustrated 13and were supported by two bars from the 14deck head and not one) 15Pine mess table 16Pine mess stoolFolding legsCast iron feet 17Corticene laid on deck 18Brass edging strips to corticene 19Table hinges 20Boot racksAngle bar for fixing end of stool 21Angle bar fOf locating table hinges 22Steel sheet for fixing lights and their cables

UghtStowed position of table (stools on top)Mess rack (sides perforated)Shelves fOf stowage of mess utensils, dittyboxes, etcHammock bar (only one shown fOf clarity, atleast four would nOfmally be visible in thisview)Hammock stowageHooks fOf stowing tableTable support barTable legs reversed for hanging table onstowage hooksKit lockersFlat bar across table support with hook fOfmess kettle

6

3

E SuperstructureE1/1

3

E111 FORE BRIDGE (late 1920 to 19drawings In sectionE1/300 scaolherwlse noted)Torpedo rangefinder and platformremoved during 1927 refit2 8ft rangefinder3 Compass platform buin up and nwindows provided after trials (rollein roof)

El/2 FORWARD SUPERSTRUCTUR


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E1/2

10

1889

11E1/317

~

1929-31 refll)Pom-pom director platforms, moposition occupied by 5.5in rangefduring 1934 refit. Port director fitte1935 refit - both removed during 1when directors repositioned on for2 5.5in rangefinder tower (moved tdeck during 1934 refit)3 Anemometer4 Wind vane5 Torpedo lookout platform6 Searchlight manipulating platform

7 9ft rangefinder (position after 192roller shutter in compass platformplated over8 Extension to roof added during 1refit9 Teak platform added during 192710 Semaphore

11 Signalman's shelter12 3pdr saluti ng gu ns13 24in signalling searchlight14 Upper tactical plot15 Torpedo control position added durefit16 Syren17 Windscreen

E1I3 FORWARD SUPERSTRUCTUR1939 refit)Distant reading thermograph addc1935-362 Type 75WIT aerial added during3 Combined anemometer and wind4 Syren fitted on reduced platform5 9ft rangefinder6 Searchlight platform removed

7 Air defence position added during8 Extension to Admiral's bridge9 0.5in MG mounting added during 10 Submarine lookouts11 12ft rangefi nder moved down fromduring 1934 refit12 Signalling lamp13 20in signalling searchlight14 Pom-pom director, moved downtop during 1936 refit15 Upper compass platform enlarge16 Air defence position added during17 HACS director MK III added (porstarboard)18 Admiral's signal platform ex1ende

E Superstructure6

11

E3/11

o


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5

3 2841315

E3/6 12 123/228

1627 --' --

6 26

24E3/7 7

E3/310

1214

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164

2 E3/8E2/1

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E3/10 5676 89

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123

524

AFTER SUPERSTRUCTURE (after 1refit)HAGS Mk I director added during1929-31 refit36in searchlights fitted athwartships du1925-26 refitSearchlight manipulating position addeduring 1925-26 refit500 galion fresh water tankManipulating position converted to HAduring 1929-31 refitRange dialAfter concentrating position added afttrials

AFTER SUPERSTRUCTURE (after 1refit)8-barrel Mk VI porn-porn added during 1refitPorn-porn ready-use magazine fitted atorpedo control tower removed during 1refitEngine room exhaust vent (as modifieduring 1929-31 refit)Quadruple 0.5in MG mounting fitted (pand starboard) during 1937 refit44in searchlights fitted during 1939 reHAGS Mk III director fitted in place of HAMk IPorn-porn director added during 1938Area under after concentrating positioenclosed during 1936 refitNew position of W IT aerial trunk to clarcs of after porn-porn

PLAN OF CONTROL TOP (port sideafter end as In 1931, starboard sidebuilt to 1929. Note: manholes no t shoPorn-porn director pOSition (1931-34)Manoeuvring lightsManoeuvring lights (1 923-29)


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lSl ~ 021 22 23


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F Rig


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7 8FiJ2 Fi j i

42

5

11 37

II I-1 . L


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F Rig


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F3/1 WIRELESS RIG (1920 to 1929.1/600 F3/2 WIRELESS RIG (1931 to 1940. 11600 18 Auxiliary aerials from second WIT officescale) scale) 19 Auxiliary aerial trunk20 Second WIT office1 Main WIT aerials (long range position) 1 Main aerial 21 FH3 HF/DF aerial (added during 1939 refit)2 Auxiliary WIT aerials (one to each forward 2 Triatic stayspur of starfish from third WIT office) 3 Main auxiliary WIT aerial3 R/T aerial 4 Type 75 VHF W IT aerials (fitted during F4 MAIN DERRICK (11150 scale)4 Auxiliary aerial from WIT office in TS 1936 refit. That on mainmast was originally5 R/T office (signal distributing office - mounted on starfish platform) 1 Topping liltremoved during 1925-26 refit) 5 Type 31 auxiliary aerial (removed 1936) 2 Derrick operating position6 Additional third WIT office (fitted during 6 Auxiliary aerial from th ird W IT office on 3 Purchase wire1925-26 or 1927 refit - Type 45) upper deck 4 Double leading block7 Third W IT office 7 Auxi liary third W IT office 5 Single leading blocks8 W IT office in transmitting station on 8 Third WIT office 6 Sheave for purchase

platform deck 9 Type 31 office (replace by Type 75 VHF set 7 Shackles for securing guysII D/ F aerial In 1936 refit) 8 Shackles for working guys


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10 D/ F aerial spreader boom. port and 10 DF aerial spreader boom 9 Double blockstarboard 11 DF office 10 Purchase11 Main auxiliary W IT aerial 12 DF aerials 11 Single block12 Triatic stay 13 Type 71 WIT aerial (set in second WIT 12 Wrapping plate13 Aerials from second WIT office office) 13 Guide tubes for topping lilt (starboard) and14 Main auxiliary WIT aerial trunk 14 FH3 HF /DF office (added during 1939 refit purchase (port) to boat holst compartment15 Main WIT aerial trunk and removed 1941) on upper deck16 MainWIT office on main deck (Types 1 and 15 Second WIT office 14 Shackle for purchase18) 16 Position of auxiliary aerials from second17 Second WIT office WI T office (alter 1939 refit)18 Position of W IT yard in home waters 17 Position of auxiliary aerials trunk from19 D/ F office second W IT office (alter 1937 refit)

F4

F Rig

2


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5

6

F9o 29

8

98


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G2/1


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G Armament02/2

t : lQ. . '+- -67


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02/533

29 14

12

G2/6 G2/2 PLAN OF GUNHOUSEG2/3 RIGHT GUN CARRIAGE ANDELEVATING GEAR

8 G2/4 REAR OF GUNHOUSE (sectionof rangeflnder)

G2/5 SECTION AT GUN LOADING G2/6 SECTION AT CENTRE-LINEG2/7 SECTION OF TRUNK (no scalekey applies to all G2 drawings


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G2/7

G ArmamentG3/1

7

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198

1

G3/2

4

1< " Ie ," ,

G4/1G3/3

14

87G3/1 PROFILE OF 'Y' SHELL ROOM (11100scale) G3/2 PLAN OF 'Y' SHELL ROOM (1/300 scale) G3/3 PLAN OF 'Y' MAGAZINE AND HANDING G4/1 5.51n Mk II MOUNTINGROOM (1/300 scale)12345678910111213141516171819

1Inner bottom 2Shell room flat 3Magazine flat (platform deck) 4Hatch on centre-line 5Overhead rail for shell grabs 6Lifting and traversing hydraulic presseso o d ~ ~ ~ 7Shell grab 8Traversing winch 9Ammunition embarkation hatch (starboard 10side) 11Hatch to 'X' shell room 12'X' shell room 13Shell binBottom of revolving trunkHydraulic valve operating standardsLifting winchHand gear for traversing bogieClutched shaft from hand gear totransversing bogieShell traversing bogieHand operated shell lifting winch

Shell binsHand lifting winch25 gallon fresh water tankHydraulic valve operating standardsTraversing winch100 ton pump (under) - fitted in all shellroomsAuxiliary hand winch to tra versing bogieLadder (up)Hatch (over)Ammunition embarkation hatch (over)Shell traversing bogieOverhead railsDoors to 'X' shell room

1234567891011121314151617181920

1Hatch (over) 2Revolving trunk in handing room 3Arched o

[conway maritime press] [anatomy of the ship] the battlecruiser hood (2010)

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