by: stuart ballantyne

By: Stuart Ballantyne.

•Sea Transports Solutions Stern Landing Vessels (S.L.V.) have carved a niche into the small ship market, opening significant opportunities for builders and operators of passenger, utility, container, ro-ro, bulk, AHTS and PSV vessels.

•The S.L.V. was a result of Sea Transport Solutions focussing on possible answers to the operational problems of conventional landing craft and to produce a vessel suitable for multi purposes.

Stern Landing VesselsStern Landing Vessels

S E A T R A N S P O R TS O L U T I O N S

Conventional Landing CraftProblem Area No. 1:-

Poor Head Sea CapabilityPoor Head Sea Capability•Having a bluff bow , waves in excess of 600mm (2 feet) start to cause slamming, jarring of the whole structure and spray enshrouding the cargo and the wheelhouse…….,

and the speed will drop dramatically

• The bow ramp in the stowed position creates a blind sector in the wheelhouse visibility. As most of these craft operate in coastal, inland and shallow areas, this of course is a problem in close quarter navigation. There are many recorded instances of groundings due to this fact, and running into windsurfers & small fishing boats at anchor has also occurred.


Poor VisibilityPoor Visibility


• The machinery space below the wheelhouse is just a source of noise and vibrations which makes life unpleasant for those onboard. For the crew, this can lead to lack of concentration and fatigue, particularly on extended voyages.

Wheelhouse on top of MachineryWheelhouse on top of Machinery


• While trying to debeach, the traditional landing barge frequently encounters difficulty, particularly where the bow has grounded. This encompasses:-1. Propellers working inefficiently (ie. in reverse).2. Problematic loading of heavy equipment & large trucks.3. Bottom suction to sea bed in low draft, soft soil areas.

Beaching and DebeachingBeaching and Debeaching


• The stability of a box shape barge is quite limited due to:

1. Low profile of the GZ curve.

2. Small freeboard, & shallow deck edge immersion 4-5degrees.

3. Free surface of numerous below deck flat bottom tanks.• The stated total deadweight (dwt) of these vessels in most cases includes

below deck liquid cargoes.

“On deck” dwt is frequently as low as 45% of the total dwt.

Lack of DeadweightLack of Deadweight


• Constant pounding of the bow ramp may Constant pounding of the bow ramp may loosen securing fixtures and drop the ramp.loosen securing fixtures and drop the ramp.

• Once the ramp submerges with the vessel Once the ramp submerges with the vessel underway the forces generated will fold the underway the forces generated will fold the ramp under the vessel and tear it off.ramp under the vessel and tear it off.

Loss of Ramp

?????? T H E S O L U T I O N T H E S O L U T I O N ??????

• In 1984, S T S established the criteria for an SLV.In 1984, S T S established the criteria for an SLV.

1. Good head sea capability.

2. Ability to beach & debeach with ease.

3. Good visibility from the wheelhouse.

4. Accommodation clear of machinery space

5. Finer hull shape with a higher sustainable speed.

6. Cargo deck spray protection

7. Less free surface in tanks.

8. Access to bottom plating when beached

9. Elimination of the suction effect

10. Total protection of the stern gear

The S.L.V. incorporates a shallow “V” hull with two side pods, offcentre shafts & a beaching/protection/aft skeg arrangement.

• The Stern Landing Vessel is now a fine tuned design that has evolved to be a commercially & operationally unbeatable landing craft design suitable for multi purposes.

Stern Landing Stern Landing VesselVessel

Introducing the . . .

Conventional Landing Craft vsConventional Landing Craft vs50m Stern Landing Vessel50m Stern Landing Vessel

““Gulf GloryGulf Glory””

Deck Area:

357m2

TEU (Gr slots):

16

Dk Dwt Cap:

300t.

Bulk Cap:

400m3

““Gulf SkyGulf Sky””

Deck Area:

306m2

TEU (Gnd):

15

Dk Dwt Cap:

300t.

Bulk Cap:

440m3

““50m S.L.V.50m S.L.V.””

Deck Area:

500m2

TEU (Gnd):

24

Dk Dwt Cap:

1000t.

Bulk Cap:

1000m3

50m Stern Landing Vessel50m Stern Landing VesselL o a d i n g C o n f i g u r a t i o n s L o a d i n g C o n f i g u r a t i o n s

Container / Roro(Stern View)

Bulk / Roro

(Stern View)

““Sylvan”Sylvan” 20m20m Papua New GuineaPapua New Guinea Utility BoatUtility Boat• ““Debarge”Debarge” 20m20m Western AustraliaWestern Australia Utility BoatUtility Boat• ““Debarge 2” 23m Western Australia Utility BoatDebarge 2” 23m Western Australia Utility Boat• ““Norwest Pearl”Norwest Pearl” 23m23m Western Australia Western Australia Pearling VesselPearling Vessel• ““Trader”Trader” 25m25m QueenslandQueensland Pass/Car FerryPass/Car Ferry• “Deepwater” 35m Queensland Bulk Carrier• “Lana” 35m New Zealand Pass/Car Ferry• “Lara V” 35m New Zealand Pass/Roro Ferry• “Matthew Flinders” 35m Tasmania Cargo+Livestock• “Tina” 40m Vanuatu Pass/Roro Ferry• “Havanna” 60m New Caledonia Pax/Roro Ferry• “Aburri” ** 80m Northern Territory Bulk Carrier• “Wunma” ** 110m Queensland Bulk Carrier

Stern Landing VesselsStern Landing VesselsCurrently OperatingCurrently Operating

Length.Length. SpeedSpeed Cargo CapacityCargo Capacity

• 20 m20 m 9 kts9 kts 38 tonnes on deck or 45 t f.o.below deck. 38 tonnes on deck or 45 t f.o.below deck.

• 25 m25 m 10 kts10 kts 95 tonnes on deck or 100 t. f.o. below deck 95 tonnes on deck or 100 t. f.o. below deck

• 35 m35 m 10 kts10 kts 470 tonnes (Sheltered waters) 470 tonnes (Sheltered waters)

350 tonnes (coastal) - 16 TEU350 tonnes (coastal) - 16 TEU

• 50 m 11 kts 1100 tonnes (sheltered waters)

900 tonnes (coastal) - 48 TEU

(similar under deck tank capacity.)

• 70 m 12 kts 1550 tonnes coastal - 130 TEU



S L V CapabilitiesS L V Capabilities

20 m Stern Loading Vessel - “M.V. SYLVAN”


- - Photo GalleryPhoto Gallery - -

23 m Stern Landing Vessel - “M.V. NORWEST PEARL”



35 m Low Profile Stern Landing Vessel - “M.V. DEEPWATER”



35 m Stern Landing Vessel - “M.V. MATTHEW FLINDERS”



35 m Stern Landing Vessel - “M.V. LANA”



40 m Stern Landing Vessel - “M.V. TINA”



50 m Stern Landing Vessel



60 m Stern Landing Vessel - for Military Use



Note:- full width of stern ramp and low hinge position, for easy and rapid loading and discharging

60m Stern Landing Vessel60m Stern Landing Vessel1200 Tonnes on deck (coastal)1200 Tonnes on deck (coastal)

Stern Landing Vessel ApplicationsStern Landing Vessel Applications

• Float on / float off utility vessel deployment• Floating dock-like properties for recovering /

discharging floating cargo• Protected stern gear to facilitate safe and easy

beaching• Platform Supply Vessels• Anchor Handling, Towing & Supply Vessels

144 TEU (shown with self contained crane)

70m SLV –1800dwt 13kts70m SLV –1800dwt 13kts

80 m Stern Loading Vessel - “M.V. ABURRI”

Stern Landing VesselsStern Landing Vessels3300 Cargo Dwt –3.5m draft3300 Cargo Dwt –3.5m draft

110m x 22 x 3.7m draft, 5,300 cargo dwt, 11kts

Stern Landing VesselStern Landing Vessel “WUNMA” - “WUNMA” -

110 m Stern Loading Vessel - “M.V. WUNMA”



Contact:-

Phone: +44 20 7681 1505Fax: +44 870 131 3568

Web: www.catamaranferries.comEmail: [email protected]

Exclusive agents for:-

S E A T R A N S P O R T S O L U T I O N S

““Sea Transport Consultants - Naval Architects”Sea Transport Consultants - Naval Architects”

mailto:[email protected]

by: stuart ballantyne

Documents

traditional landing

bow ramp

deck dwt

wheelhouse visibility

loss of ramp

sea bed

total dwt

cargo deck spray protection