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Submarine Chasers of the Japanese Navy.

Data here is the data released to the public

Shi Ichi Class
S-1 to S-42

Dimensions: 210.00 ft x 20.00 ft x 5.00 ft
Standard Displacement: 280 tons
Armament: 2 - 10.5 cm / 50 cal Model 1914 guns
4 - 50 mm / 60 cal Model 1914 AA guns
8 - 25 mm / 60 cal Model 1914 light AA guns
Armour: Main gun shields 1.00", AA gun shields 1.00", Light AA gun shields 1.00"
Machinery: 3 Kanpon oil fired boilers, Brown Curtis geared,
Geared drive, 2 shafts, 1,600 shp = 17.50 kts
Range 3,000nm at 12.00 kts
Complement: 7 Officers, 42 other rank

Shi Ichi, Japan Submarine Chaser laid down 1916
All scrapped in 1943

Displacement:
271 t light; 285 t standard; 330 t normal; 365 t full load
Loading submergence 80 tons/feet

Dimensions:
210.00 ft x 20.00 ft x 5.00 ft (normal load)
64.01 m x 6.10 m x 1.52 m

Armament:
2 - 4.13" / 105 mm guns
4 - 1.97" / 50 mm AA guns
8 - 0.98" / 25 mm guns
Weight of broadside 90 lbs / 41 kg

Armour:
Main gun shields 1.00" / 25 mm, AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 1,773 shp / 1,322 Kw = 18.50 kts
Range 3,300nm at 12.00 kts

Complement:
38 - 50

Cost:
£0.046 million / $0.184 million

Distribution of weights at normal displacement:
Armament: 11 tons, 3.4 %
Armour: 5 tons, 1.5 %
Belts: 0 tons, 0.0 %, Armament: 5 tons, 1.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 66 tons, 20.0 %
Hull, fittings & equipment: 159 tons, 48.1 %
Fuel, ammunition & stores: 59 tons, 17.9 %
Miscellaneous weights: 30 tons, 9.1 %

Metacentric height 0.6

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is adequate

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.16
Shellfire needed to sink: 470 lbs / 213 Kg = 13.3 x 4.1 " / 105 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 51 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.32
Relative quality as seaboat: 1.03

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.34
Hull speed coefficient 'M': 9.28
'Natural speed' for length: 14.49 kts
Power going to wave formation at top speed: 52 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 101.2 %
Relative accommodation and working space: 98.7 %
(Average = 100%)
Displacement factor: 128 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.04
(Structure weight / hull surface area: 36 lbs / square foot or 176 Kg / square metre)
Relative longitudinal hull strength: 1.21
(for 7.00 ft / 2.13 m average freeboard, freeboard adjustment -0.65 ft)
Relative composite hull strength: 1.06