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Khitriy class coastal submarines
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Khitriy class is economical, yet long-ranged.

Khitriy (Stealthy) class, Russian Coast Defense Submarine laid down 1925

Displacement:
365 t light; 374 t standard; 444 t normal; 500 t full load

Dimensions: Length overall / water x beam x draught
147.64 ft / 147.64 ft x 17.88 ft x 12.80 ft (normal load)
45.00 m / 45.00 m x 5.45 m x 3.90 m

Armament:
1 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1925 Model
Anti-aircraft gun in deck mount
on centreline forward
Weight of broadside 2 lbs / 1 kg
Shells per gun, main battery: 500
4 - 20.9" / 530 mm submerged torpedo tubes

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 452 shp / 337 Kw = 12.00 kts
Range 8,000nm at 10.00 kts (Bunkerage = 125 tons)

Diving characteristics:
Operational depth - 360ft/110m
Emergency depth - 576ft/176m
Crush depth - 900ft/274m

Complement:
23 - 31

Cost:
£0.049 million / $0.196 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Machinery: 15 tons, 3.3 %
Hull, fittings & equipment: 251 tons, 56.6 %
Fuel, ammunition & stores: 79 tons, 17.8 %
Miscellaneous weights: 99 tons, 22.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
219 lbs / 99 Kg = 141.9 x 1.5 " / 37 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.4 ft / 0.1 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 0 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.460
Length to Beam Ratio: 8.26 : 1
'Natural speed' for length: 12.15 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (40 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.1 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 1,698 Square feet or 158 Square metres
Displacement factor (Displacement / loading): 342 %
Structure weight / hull surface area: 92 lbs/sq ft or 449 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.60
- Longitudinal: 3.61
- Overall: 3.60
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability


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