P-1, Turkey Patrol Boat laid down 1925
Displacement:
433 t light; 453 t standard; 465 t normal; 473 t full load
Dimensions: Length overall / water x beam x draught
200.14 ft / 200.00 ft x 25.00 ft x 7.00 ft (normal load)
61.00 m / 60.96 m x 7.62 m x 2.13 m
Armament:
2 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1925 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1925 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1925 Model
Breech loading guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 113 lbs / 51 kg
Shells per gun, main battery: 150
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 1.00" / 25 mm -
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 1 shaft, 1,241 shp / 926 Kw = 16.00 kts
Range 2,000nm at 8.00 kts (Bunkerage = 22 tons)
Complement:
49 - 65
Cost:
£0.107 million / $0.428 million
Distribution of weights at normal displacement:
Armament: 14 tons, 3.0 %
Armour: 6 tons, 1.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 1.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 40 tons, 8.7 %
Hull, fittings & equipment: 372 tons, 80.0 %
Fuel, ammunition & stores: 32 tons, 6.9 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,215 lbs / 551 Kg = 34.4 x 4.1 " / 105 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 0.8 ft / 0.2 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.38
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.465
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 14.14 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 1.00 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 %): 8.00 ft / 2.44 m
- Mid (50 %): 8.00 ft / 2.44 m
- Quarterdeck (15 %): 7.50 ft / 2.29 m (8.00 ft / 2.44 m before break)
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 7.89 ft / 2.40 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.9 %
- Above water (accommodation/working, high = better): 100.4 %
Waterplane Area: 3,230 Square feet or 300 Square metres
Displacement factor (Displacement / loading): 232 %
Structure weight / hull surface area: 75 lbs/sq ft or 367 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.01
- Longitudinal: 3.77
- Overall: 2.14
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
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S-1, Turkey Subchaser laid down 1925
Displacement:
100 t light; 103 t standard; 108 t normal; 112 t full load
Dimensions: Length overall / water x beam x draught
110.14 ft / 110.00 ft x 15.00 ft x 4.50 ft (normal load)
33.57 m / 33.53 m x 4.57 m x 1.37 m
Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1925 Model
Quick firing gun in deck mount
on centreline forward
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1925 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 22 lbs / 10 kg
Shells per gun, main battery: 140
Machinery:
Petrol Internal combustion motors,
Direct drive, 1 shaft, 669 shp / 499 Kw = 16.00 kts
Range 1,500nm at 9.00 kts (Bunkerage = 9 tons)
Complement:
16 - 21
Cost:
£0.028 million / $0.113 million
Distribution of weights at normal displacement:
Armament: 3 tons, 2.5 %
Machinery: 21 tons, 19.0 %
Hull, fittings & equipment: 26 tons, 24.2 %
Fuel, ammunition & stores: 9 tons, 8.0 %
Miscellaneous weights: 50 tons, 46.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
53 lbs / 24 Kg = 2.5 x 3.5 " / 88 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.3 ft / 0.1 m
Steadiness - As gun platform (Average = 50 %): 63 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.81
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.510
Length to Beam Ratio: 7.33 : 1
'Natural speed' for length: 10.49 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 1.00 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 %): 8.00 ft / 2.44 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: 8.00 ft / 2.44 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 130.8 %
- Above water (accommodation/working, high = better): 105.7 %
Waterplane Area: 1,109 Square feet or 103 Square metres
Displacement factor (Displacement / loading): 94 %
Structure weight / hull surface area: 10 lbs/sq ft or 51 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.39
- Longitudinal: 5.09
- Overall: 0.51
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather