Myak (Poppy) class, Russian Corvette laid down 1925

Displacement:
515 t light; 541 t standard; 597 t normal; 642 t full load

Dimensions: Length overall / water x beam x draught
268.71 ft / 229.66 ft x 21.33 ft x 10.66 ft (normal load)
81.90 m / 70.00 m x 6.50 m x 3.25 m

Armament:
3 - 3.94" / 100 mm guns in single mounts, 37.48lbs / 17.00kg shells, 1925 Model
Dual purpose guns in deck mounts
on centreline ends, majority forward, 1 raised mount
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1925 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 119 lbs / 54 kg
Shells per gun, main battery: 200
4 - 20.9" / 530 mm above water torpedoes
10 tons depth charges

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm - -
2nd: 0.98" / 25 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,004 shp / 11,939 Kw = 31.00 kts
Range 3,800nm at 12.00 kts (Bunkerage = 101 tons)

Complement:
59 - 78

Cost:
£0.226 million / $0.903 million

Distribution of weights at normal displacement:
Armament: 12 tons, 2.0 %
Armour: 7 tons, 1.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 1.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 291 tons, 48.7 %
Hull, fittings & equipment: 195 tons, 32.7 %
Fuel, ammunition & stores: 82 tons, 13.7 %
Miscellaneous weights: 10 tons, 1.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
164 lbs / 75 Kg = 5.4 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 0.7 ft / 0.2 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.44
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.77 : 1
'Natural speed' for length: 17.42 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 32.81 ft / 10.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.16 ft / 5.23 m
- Forecastle (20 %): 17.16 ft / 5.23 m (10.33 ft / 3.15 m aft of break)
- Mid (50 %): 10.33 ft / 3.15 m
- Quarterdeck (15 %): 10.33 ft / 3.15 m
- Stern: 10.33 ft / 3.15 m
- Average freeboard: 11.70 ft / 3.57 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 175.8 %
- Above water (accommodation/working, high = better): 46.4 %
Waterplane Area: 3,129 Square feet or 291 Square metres
Displacement factor (Displacement / loading): 52 %
Structure weight / hull surface area: 24 lbs/sq ft or 118 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 4.66
- Overall: 0.62
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is extremely poor