Ta Khmao, Cambodian Harbour Tug laid down 1946
Displacement:
85 t light; 89 t standard; 100 t normal; 109 t full load
Dimensions: Length overall / water x beam x draught
90.22 ft / 90.22 ft x 18.04 ft x 4.92 ft (normal load)
27.50 m / 27.50 m x 5.50 m x 1.50 m
Armament:
1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1946 Model
Anti-aircraft gun in deck mount
on centreline forward, 1 raised gun
2 - 0.59" / 15.0 mm guns (1x2 guns), 0.10lbs / 0.05kg shells, 1946 Model
Machine guns in deck mount
on centreline aft, all raised guns - superfiring
Weight of broadside 2 lbs / 1 kg
Shells per gun, main battery: 1,500
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm - -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 423 shp / 316 Kw = 15.00 kts
Range 2,500nm at 12.00 kts
Bunker at max displacement = 20 tons
Complement:
15 - 20
Cost:
£0.033 million / $0.133 million
Distribution of weights at normal displacement:
Armament: 0 tons, 0.3 %
Armour: 1 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 11 tons, 10.6 %
Hull, fittings & equipment: 61 tons, 61.4 %
Fuel, ammunition & stores: 15 tons, 15.2 %
Miscellaneous weights: 12 tons, 12.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
348 lbs / 158 Kg = 178.0 x 1.6 " / 40 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 0.4 ft / 0.1 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.47
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.437
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 11.69 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 12.00 ft / 3.66 m
- Forecastle (20 %): 10.00 ft / 3.05 m
- Mid (50 %): 8.00 ft / 2.44 m
- Quarterdeck (15 %): 8.00 ft / 2.44 m
- Stern: 8.00 ft / 2.44 m
- Average freeboard: 8.86 ft / 2.70 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.7 %
- Above water (accommodation/working, high = better): 114.7 %
Waterplane Area: 1,067 Square feet or 99 Square metres
Displacement factor (Displacement / loading): 279 %
Structure weight / hull surface area: 28 lbs/sq ft or 137 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.03
- Longitudinal: 20.62
- Overall: 1.38
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
Ships in Class:
- Ta Khmao