part ni british underwater ordnance - disposal handbook, part 3.pdfbritish depth bombs ... part ii i...

PART in

BRITISH UNDERWATER ORDNANCE

CONFIDENTIAL

TABLE OF CONTENTS

PART I I I - BRITISH UNDERWATER ORDNANCE

CHAPTER 1

BRITISH INFLUENCE MINESPage

Mine Cftart (Tuble 1) .......................................................................................... 2In troduction ......................................................................................................... 3"A " Mark I ("A " Mark I I , I I I and IV ) .......................................................... 5A

A nA

Mark V T ............................................................................................ ..MX"A " Mark

U f l r l fV T T ...........................................................................................

nu t*V t i r k T T ............................................................................................ ,

"M" Mark I l l ......................................................

CHAPTER 2

BRITISH CONTACT MINES

Mine Chart (Tab le 1) .......................................................................................... 2In troduction .......................................................................................................... 3H I I Murk I I ........................................................................................................ 5*T" Mark I I I ......................................................................................................... 9V ickers Antenna .................................................................................................... 11Murk XIV (Mark XV, XVI and X V II) ................................................................. 15Mark XIX ................................................................................................................ 21Mark XIXs (Mark XXVII) .................................................................................... 25Mark XX (Mark XX*) ............................................................................................ 29Murk XXII (Mark X X II* ) .................................................................................... 33Mark XXV ................................................................................................................ 37

CHAPTER 3

BRITISH TORPEDOES

Torpedo Chart (Table 1 ) .................................................................................... 2Warhead Chart (Tablo 2) .................................................................................... 4In troduction .......................................................................................................... 621" Duplex Impact-Only Exploder, Mark I and I * * .................................... 7C.C.R. Exploder, Mark I and I * * .................................................................... 1118" Duplex Exploder, Mark I (Mark I I ) ........................................................ 13Above-Water Sxplodor .......................................................................................... 15Exploder Churt (Table 3) .................................................................................. 20Type 3 E x p lo d e r .................................................................................................... 21

CHAPTER 4

BRITISH DEPTH CHARGES

Depth Charge Chart (Tab le 1) .......................................................................... 2In troduction ......................................................................................................... 3Mark V II (Mark V I I * , Mark X I I I ) ...................................................................... 3Mark V II (Heavy) .................................................................................................. 5Mark V I I I (Mark XI, X I * ) ................................................................................. 7Mark X (Murk X *) .................................................................................................. 11Mark X II .................................................................................................................. 15P is to ls Mark V I I , V I I * , V II*A , V I I * * , V II* *A , und V I I I ...................... 17P is to ls Mark V I I I * , V I I I * * , V I I I * * * , IX, IX *. IX ** , IX *** , X I,X I* , XI*C, and X I I I ...................................................................................... 19P is to ls Mark X IIIA , X I I I * , XIV, X IV*, XV, XVC ........................................ 21P is to ls Mark XVI, XVI*, XIX, XX, XX*, XXI ................................................ 27Primers (B oosters ) Mark V I I , V II No. 2, V I I I , VIA, X .......................... 27Primer P lucors (Booster Extenders) Mark I & I * ...................................... 29

CHAPTER 5

BRITISH DEPTH BOMBS

Depth Bomb Chart (Table 1 ) .............................................................................. 2Depth Bomb Fuzes (Table 2) .............................................................................. 2In troduction ............................................................ ............................................ 3Nose Fuze #32, Mark3 I I * and I I I .................................................................. 9T a ll Fuzes #895A, Mark I , #875A, #8?5B and #875C .................................. 11T a l l Fuzes #862, Marks I and I I ...................................................................... 11

Added 1 July 1945 (Change No. 8) -1 1 - COHFIDENTIAL

TABLE 07 CONTENTS

PART I I I - BRITISH UNDERWATER ORDNANCE

CHAPTER 6

BRITISH AHEAD-THROWN ANTI-SUBMARINE WEAPONSPage

In troduction .......................................................................................................... 3Hedgehog .............................................................................................................. 3Squid ....................................................................................................................... 3

CHAPTER 7

BRITISH CONTROLLED MINES

L Mark I (L Mark I I ) .......................................................................................... 3

Added 1 July 19^5CONFIDENTIAL - H i - (Change No. 8)

PART n

BRITISH UNDERWATER ORDNANCE

CHAPTER 5

BRITISH DEPTH BOMBS

DECEMBER 1. 194-4 CONFIDENTIAL

5R IT ISH DEPTH BOMBS

B ritishDesignation

Tota lWeight( lb s . )

Type & wt. o f Charge( lbs.)

,Shape

Nose

Max.Dlara.

O vera llLength( i n . )

Fuzing Markings Status

MJc. I 100 45 KDX/TNT or

49 Torpex

Round 8.05 42 NoseFuze# 32

DarX green o v e r a l l , i "

Obsolescent

MX. I I 100 It It It It 1 " from 1 M

II

MX. I l l 100 N "It It " l ig h t^ r e e n

band 6If

MX. IV 100 It It II T a il P ls to la *28 or #30

from nose. Early designs, yellow

11

MX. VI 100 ii Sec Note 1

II See Note 1

IIo v e ra ll.

S erv ice

MX. I 250 149 Bara to 1 or

140 TNT-

Round 11.2 59 Nose Fuze # 32 Same as

100 lb . c la s s ,

Obsolescent

MX. I I 250 ! I I II II II It

MX. I l l 250 It It It t ft that l ig h t green band is 4" from nose.

II

MX. IV 250 154 kdx/tnt 152 TNT

It 11.35 58 T a il P is to ls #28 or #30

Service

MX. I 500 291 TNT Round 14.0 74 Nose Fuze # 32 Same as

100 lb . c lasso r / * a n t

Obsolescent

MX. I I 500 It It It 1 II

MX. I l l 500 508 Baratol n 14.3 76 1 that l ig h t II

MX. IV 500 282 TNT It 1 72.5 T a ilPl3tOl3#28 or #30

sreen Dana is 6"from nose.

II

Me. I 600

1

432 Mlnol 439 Torpex

Concave17.5 56.7 T a ilFuzeif 0*?

Same gene ra l markings.

Service

Note -1. Attachment welded to nose to prevent r icoch et. Increasing the o v e ra ll

length o f 42 Inches by severa l inches.Table 1 - B r it ish Depth Bombs

B r it ishDesignation

Location F itted in the fo llo w ing bombs

Means o f Arming

Means o f F ir in g

Max.Dlam.

Length Status

No. 32 Fuze

Nose MX. I , I I , I I I ser ies .

A ir vanes. 200 f t . a t 100 m/hr.

Impact w ith delays o f 0 .5 ,1 . 0 , 1 . 5 , 2.0 seconds.

2?5 7'.'0 Obsolescent.

No. 30 P is to l No. 28 P is to l

T a il mx. r r, v iSeries.

A ir vane. 13 revolu tions

Impact with delays up to 113CCOnd3.

2?0 3'.'88 S erv ic e . # 28 is fo r land bombardment.

No. 862 Fuze

T a il Mk. I 600 lbs.

Arming w ire w ith drawn.

Hydros ta t ic Pressure 30 f t . depth.

2?0 5"5 S erv ice .

No. 875 * 895Fuzes

T a ll Mk. VI 100 lb . Mk. I 600 lb .

Arming w ire w ithdrawn.

Hydros ta t icPressure.

2?13 4V75 Service 895 is re p lacing 875.

Table 2 - B r it is h Depth Bomb Fuzes and P is to ls

CONFIDENTIAL -2

BRITISH DEPTH BOMBS

In troduction

I . The B r it is h employ fou r s izes and types o f depth boobs:

(a ) 100 lb . Marks I , I I . H I . iv and VI

( * ) 250 lb . Marks I , I I . I I I and IV.

(c ) 500 lb . Marks I , I I . I I I and IV.

(d ) 600 lb . Mark I .

2. Service depth bombs are o rd in a r ily fuzed In the t a l l on ly , although e a r l ie r models, now obso lescen t, employ only nose fu zes. In rare cases, both nose and t a l l fuzes may be encountered. Two methods are employed to obtain depth f i r in g :

(a ) Delay f i r in g detonators and powder tra in s .

(b ) H ydrostatic fu zes.

>. A l l s