Amuay Bay, Atlantean Landing ship dock laid down 1942
Names: Amuay Bay, Playa Blanca, Playa de las Americas, Playa Bonaire
Displacement:
12,455 t light; 12,870 t standard; 16,221 t normal; 18,902 t full load
Dimensions: Length overall / water x beam x draught
535.49 ft / 524.93 ft x 80.50 ft x 20.67 ft (normal load)
163.22 m / 160.00 m x 24.54 m x 6.30 m
Armament:
4 - 5.10" / 130 mm guns (2x2 guns), 66.33lbs / 30.09kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on centreline, all forward, 1 raised mount - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.88kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 301 lbs / 136 kg
Shells per gun, main battery: 500
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Ends: Unarmoured
- Torpedo Bulkhead:
1.38" / 35 mm 262.47 ft / 80.00 m 20.67 ft / 6.30 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm - -
- Armour deck: 1.18" / 30 mm, Conning tower: 1.18" / 30 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 12,923 shp / 9,640 Kw = 18.00 kts
Range 15,000nm at 18.00 kts
Bunker at max displacement = 6,033 tons
Complement:
718 - 934
Cost:
£3.276 million / $13.103 million
Distribution of weights at normal displacement:
Armament: 38 tons, 0.2 %
Armour: 1,047 tons, 6.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 277 tons, 1.7 %
- Armament: 16 tons, 0.1 %
- Armour Deck: 738 tons, 4.5 %
- Conning Tower: 16 tons, 0.1 %
Machinery: 338 tons, 2.1 %
Hull, fittings & equipment: 4,883 tons, 30.1 %
Fuel, ammunition & stores: 3,767 tons, 23.2 %
Miscellaneous weights: 6,150 tons, 37.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
41,675 lbs / 18,904 Kg = 628.3 x 5.1 " / 130 mm shells or 7.3 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 4.9 ft / 1.5 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.650
Length to Beam Ratio: 6.52 : 1
'Natural speed' for length: 26.65 kts
Power going to wave formation at top speed: 38 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.00 ft / 8.84 m
- Forecastle (20 %): 26.00 ft / 7.92 m
- Mid (50 %): 23.00 ft / 7.01 m
- Quarterdeck (30 %): 15.00 ft / 4.57 m (23.00 ft / 7.01 m before break)
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 21.89 ft / 6.67 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.2 %
- Above water (accommodation/working, high = better): 214.1 %
Waterplane Area: 33,773 Square feet or 3,138 Square metres
Displacement factor (Displacement / loading): 198 %
Structure weight / hull surface area: 107 lbs/sq ft or 520 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.03
- Longitudinal: 1.68
- Overall: 1.08
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Notes:
-3,058.5 tons water in flooded well deck simmed as fuel. range is 7500nm @ 18 knots
-well deck is 62m long x 18m wide x 2.75m deep at full load, with water 3,069 tons (1 ton=1 m^3)
Breakdown of Misc weights:
1,400 tons for 700 troops (400 troops standard)
1,200 tons for four LCT type 2's in aft well (2 LCT side by side)
500 tons for helicopter landing platform over aft well deck
100 tons for four helicopters
450 tons for 15x30 ton tanks
324 tons for 27x12 ton vehicles
48 tons for four LCP type 2's in davits
Total 4,022
2,128 tons for workshops, cranes, ballast pumping system, cargo/gear and all other necessities as required