Lankiam, Philippine Seaplane Tender laid down 1950
Displacement: 1,095 t light; 1,148 t standard; 1,589 t normal; 1,942 t full load
Dimensions: Length overall / water x beam x draught
305.75 ft / 295.28 ft x 38.55 ft x 10.50 ft (normal load) [93.19 m / 90.00 m x 11.75 m x 3.20 m]
Armament:
2 - 4.53" / 115 mm guns in single mounts, 46.40lbs / 21.05kg shells, 1950 Model Dual purpose guns in deck mounts on centreline ends, evenly spread, 1 raised mount
2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1950 Model Anti-aircraft guns in deck mount on side amidships, all raised guns
Weight of broadside 104 lbs / 47 kg
Shells per gun, main battery: 350
Armour:
Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.39" / 10 mm -
Machinery:
Diesel Internal combustion motors, Geared drive, 2 shafts, 3,697 shp / 2,758 Kw = 18.00 kts
Range 14,500nm at 14.00 kts
Bunker at max displacement = 794 tons
Complement: 125 - 163
Cost: £0.482 million / $1.928 million
Distribution of weights at normal displacement:
Armament: 13 tons, 0.8 %
Armour: 3 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 88 tons, 5.6 %
Hull, fittings & equipment: 690 tons, 43.4 %
Fuel, ammunition & stores: 494 tons, 31.1 %
Miscellaneous weights: 300 tons, 18.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 6,537 lbs / 2,965 Kg = 140.9 x 4.5 " / 115 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 82 %
- Recoil effect (Restricted arc if above 1.00): 0.12
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has raised forecastle, low quarterdeck
Block coefficient: 0.465
Length to Beam Ratio: 7.66 : 1
'Natural speed' for length: 17.18 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 41
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.15 ft / 6.75 m
- Forecastle (20 %): 20.51 ft / 6.25 m (19.69 ft / 6.00 m aft of break)
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (50 %): 11.48 ft / 3.50 m (19.69 ft / 6.00 m before break)
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 15.88 ft / 4.84 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47.0 %
- Above water (accommodation/working, high = better): 220.6 %
Waterplane Area: 7,355 Square feet or 683 Square metres
Displacement factor (Displacement / loading): 272 %
Structure weight / hull surface area: 52 lbs/sq ft or 256 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.87
- Longitudinal: 3.84
- Overall: 1.01
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
Aviation fuel storage simmed as additional bunkers
True radius 7,000 nm on 217 tons of fuel; Aviation fuel stores - 220 tons
Breakdown of miscellaneous weight:
100 tons reserved for two aircraft handling cranes and deck gear
80 tons reserved for service workshops
80 tons reserved for spare aircrew accommodation
40 tons reserved for dry stores and spares