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1

Friday, January 27th 2006, 7:02am

Landing craft

10 LCT Type 1
40 LCT Type 2
20 LCM Type 1
140 LCM Type 2
100 LCM Type 3 (200 ordered
50 LCM Type 4 (100 ordered)
570 LCVP (600 ordered)
38 Infantry launches (taken out of service, used as auxillary vessels in port)

2

Friday, January 27th 2006, 7:03am

LCT Type 2, Atlantean Landing Craft laid down 1940

Displacement:
274 t light; 282 t standard; 290 t normal; 296 t full load

Dimensions: Length overall / water x beam x draught
107.60 ft / 100.00 ft x 24.00 ft x 5.60 ft (normal load)
32.80 m / 30.48 m x 7.32 m x 1.71 m

Armament:
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1940 Model
Machine guns in deck mounts
on centreline ends, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1940 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 1 lbs / 0 kg
Shells per gun, main battery: 3,000

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 128 shp / 96 Kw = 9.00 kts
Range 1,500nm at 9.00 kts
Bunker at max displacement = 15 tons

Complement:
34 - 45

Cost:
£0.061 million / $0.244 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 3 tons, 1.2 %
Hull, fittings & equipment: 121 tons, 41.6 %
Fuel, ammunition & stores: 16 tons, 5.5 %
Miscellaneous weights: 150 tons, 51.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
549 lbs / 249 Kg = 2,250.4 x 0.8 " / 20 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 0.7 ft / 0.2 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
and transom stern
Block coefficient: 0.755
Length to Beam Ratio: 4.17 : 1
'Natural speed' for length: 12.00 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 26
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 12.00 ft / 3.66 m
- Forecastle (20 %): 11.00 ft / 3.35 m (6.00 ft / 1.83 m aft of break)
- Mid (50 %): 6.00 ft / 1.83 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m (6.00 ft / 1.83 m before break)
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 7.91 ft / 2.41 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 61.9 %
- Above water (accommodation/working, high = better): 70.9 %
Waterplane Area: 2,111 Square feet or 196 Square metres
Displacement factor (Displacement / loading): 184 %
Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.50
- Longitudinal: 6.44
- Overall: 1.73
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Excellent seaboat, comfortable, can fire her guns in the heaviest weather


LCT type 1


Atlantean Landing Craft, Tank laid down 1932 (1931 design)

Displacement:
300 t light; 308 t standard; 314 t normal; 318 t full load

Dimensions: Length overall / water x beam x draught
134.24 ft / 125.00 ft x 34.00 ft x 4.10 ft (normal load)
40.92 m / 38.10 m x 10.36 m x 1.25 m

Armament:
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 1 lbs / 0 kg
Shells per gun, main battery: 2,500

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.79" / 20 mm 100.00 ft / 30.48 m 4.00 ft / 1.22 m
Ends: 0.39" / 10 mm 25.00 ft / 7.62 m 7.00 ft / 2.13 m
Upper: 0.39" / 10 mm 100.00 ft / 30.48 m 7.00 ft / 2.13 m
Main Belt covers 123 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -

- Conning tower: 1.00" / 25 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 403 shp / 300 Kw = 11.50 kts
Range 1,400nm at 7.00 kts
Bunker at max displacement = 11 tons

Complement:
36 - 48

Cost:
£0.053 million / $0.214 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 29 tons, 9.3 %
- Belts: 28 tons, 8.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 12 tons, 3.8 %
Hull, fittings & equipment: 78 tons, 25.0 %
Fuel, ammunition & stores: 14 tons, 4.4 %
Miscellaneous weights: 180 tons, 57.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
480 lbs / 218 Kg = 1,960.2 x 0.8 " / 20 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.5 ft / 0.4 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.32

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.630
Length to Beam Ratio: 3.68 : 1
'Natural speed' for length: 11.18 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.00 ft / 4.88 m
- Forecastle (20 %): 7.00 ft / 2.13 m
- Mid (50 %): 7.00 ft / 2.13 m
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 7.72 ft / 2.35 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.2 %
- Above water (accommodation/working, high = better): 118.4 %
Waterplane Area: 3,196 Square feet or 297 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 20 lbs/sq ft or 99 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.62
- Longitudinal: 1.86
- Overall: 0.69
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

3

Thursday, August 24th 2006, 9:14am

LCM type 4
220 built between 1942/47
Displacement: 52 tons
Length: 50 feet
Beam: 14 feet
Draft: 3 feet (forward); 4 feet (aft)
Propulsion: 2xAtlas 250hp diesel engines
Speed: 8 knots (loaded); 10 knots (empty)
Armament: two .50-cal MG
Crew: 4
Capacity: One 30-ton tank, 160 troops (space), or 30 tons (60,000 lb) of cargo

LCM type 3

230 built between 1942/47
Displacement: 30 tons
Length: 45 ft
Beam: 14 ft
Draft: 1.5 feet (forward); 4 feet (aft)
Propulsion: 2xAtlas 250hp diesel engines
Speed: 9 knots
Armament: two .50-cal machine guns
Crew: 4
capacity; 100 troops, or one 14 ton tank, or 15 tons (30,000 lb) of cargo

LCM type 2 (formerly LCP type 2)

The Landing Craft Personel Type 2 is designed to be launched from its tender ship and deliver its complement of up to 48 troops to shore with greater efficiency than the current Infantry launches in service. To achieve this the craft has a large bow door that doubles as a ramp to allow troops to disembark. Due to its displacement they were reclassed as LCM's and called LCM type 2's.

The craft has two 7.62mm guns for defence and a crew of three.

140 in service

LCP-39 through 178, Atlantean Landing Craft Infantry laid down 1927

Displacement:
22 t light; 22 t standard; 23 t normal; 23 t full load

Dimensions: Length overall / water x beam x draught
39.43 ft / 38.20 ft x 11.20 ft x 3.20 ft (normal load)
12.02 m / 11.64 m x 3.41 m x 0.98 m

Armament:
2 - 0.30" / 7.62 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1927 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 200

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.20" / 5 mm 38.00 ft / 11.58 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 153 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.78" / 20 mm 0.78" / 20 mm -

Machinery:
Petrol Internal combustion motors,
Direct drive, 2 shafts, 75 shp / 56 Kw = 10.00 kts
Range 80nm at 10.00 kts
Bunker at max displacement = 1 tons

Complement:
4 - 6

Cost:
£0.004 million / $0.016 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 3 tons, 11.0 %
- Belts: 2 tons, 10.1 %
Machinery: 2 tons, 10.4 %
Hull, fittings & equipment: 9 tons, 40.0 %
Fuel, ammunition & stores: 1 tons, 3.4 %
Miscellaneous weights: 8 tons, 35.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
52 lbs / 24 Kg = 3,846.3 x 0.3 " / 8 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.2 ft / 0.1 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 32 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.80

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.582
Length to Beam Ratio: 3.41 : 1
'Natural speed' for length: 6.18 kts
Power going to wave formation at top speed: 78 %
Trim (Max stability = 0, Max steadiness = 100): 26
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 7.00 ft / 2.13 m
- Forecastle (20 %): 6.50 ft / 1.98 m (6.20 ft / 1.89 m aft of break)
- Mid (0 %): 6.00 ft / 1.83 m
- Quarterdeck (15 %): 6.00 ft / 1.83 m
- Stern: 6.00 ft / 1.83 m
- Average freeboard: 6.12 ft / 1.87 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 72.9 %
- Above water (accommodation/working, high = better): 87.5 %
Waterplane Area: 308 Square feet or 29 Square metres
Displacement factor (Displacement / loading): 149 %
Structure weight / hull surface area: 13 lbs/sq ft or 65 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.76
- Longitudinal: 40.76
- Overall: 1.13
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather


LCM Type 1

20 built

Displacement:
29 t light; 29 t standard; 29 t normal; 30 t full load

Dimensions: Length overall / water x beam x draught
45.70 ft / 45.00 ft x 14.00 ft x 2.50 ft (normal load)
13.93 m / 13.72 m x 4.27 m x 0.76 m

Armament:
2 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1931 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread, all raised mounts
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 800

Armour:
- Conning tower: 10.00" / 254 mm

Machinery:
Petrol Internal combustion motors,
Geared drive, 2 shafts, 33 shp / 24 Kw = 8.00 kts
Range 80nm at 5.00 kts
Bunker at max displacement = 0 tons

Complement:
3

Cost:
£0.005 million / $0.020 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 2 tons, 7.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 2 tons, 7.0 %
Machinery: 1 tons, 3.3 %
Hull, fittings & equipment: 26 tons, 87.1 %
Fuel, ammunition & stores: 1 tons, 2.6 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
387 lbs / 176 Kg = 28,660.5 x 0.3 " / 8 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.3 ft / 0.1 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.655
Length to Beam Ratio: 3.21 : 1
'Natural speed' for length: 6.71 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 41
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 8.00 ft / 2.44 m
- Forecastle (20 %): 5.00 ft / 1.52 m
- Mid (50 %): 5.00 ft / 1.52 m
- Quarterdeck (15 %): 5.00 ft / 1.52 m
- Stern: 5.00 ft / 1.52 m
- Average freeboard: 5.24 ft / 1.60 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 12.8 %
- Above water (accommodation/working, high = better): 77.0 %
Waterplane Area: 485 Square feet or 45 Square metres
Displacement factor (Displacement / loading): 730 %
Structure weight / hull surface area: 36 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.98
- Longitudinal: 25.69
- Overall: 2.55
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily


Draft (loaded): 1'4" forward, 4' aft
Cargo capacity: 12 tons
Engines: 2x100hp

4

Thursday, August 24th 2006, 9:15am

LCVP type 1, designed to be more versatile than the LCP type 1 boats they can carry small vehicles such as Jeeps and staff cars of up to 6,000 lbs.

Displacement: 10 tons
Length: 37 ft
Beam: 10.5 ft
Draft: 2.5 feet (forward), 3 feet (aft)
Propulsion: 1x Atlas 250hp marine diesel engine, 1 shaft
Speed: 12 knots
Armament: two .30-cal machine guns
Crew: 4
capacity: 6,000 lb vehicle or 8,000 lb of cargo (typically 40 troops)

5

Wednesday, January 2nd 2008, 5:39am

Infantry launch (38 built)