CSM-81 Class, French Subchaser laid down 1933
Displacement:
100 t light; 106 t standard; 116 t normal; 124 t full load
Dimensions: Length overall / water x beam x draught
108.27 ft / 108.27 ft x 17.72 ft x 4.92 ft (normal load)
33.00 m / 33.00 m x 5.40 m x 1.50 m
Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1933 Model
Dual purpose gun in deck mount
on centreline forward
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.89kg shells, 1933 Model
Anti-aircraft guns in deck mount
on centreline aft
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 18 lbs / 8 kg
Shells per gun, main battery: 350
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 896 shp / 669 Kw = 18.00 kts
Range 1,800nm at 12.00 kts
Bunker at max displacement = 17 tons
Complement:
16 - 22
Cost:
£0.043 million / $0.171 million
Distribution of weights at normal displacement:
Armament: 2 tons, 1.9 %
Armour: 1 tons, 1.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 1.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 26 tons, 22.5 %
Hull, fittings & equipment: 59 tons, 51.3 %
Fuel, ammunition & stores: 16 tons, 13.8 %
Miscellaneous weights: 11 tons, 9.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
217 lbs / 99 Kg = 16.9 x 3.0 " / 75 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.4 ft / 0.1 m
Roll period: 11.1 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.25
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.430
Length to Beam Ratio: 6.11 : 1
'Natural speed' for length: 12.54 kts
Power going to wave formation at top speed: 71 %
Trim (Max stability = 0, Max steadiness = 100): 41
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: 11.48 ft / 3.50 m
- Forecastle (20 %): 9.84 ft / 3.00 m
- Mid (50 %): 8.20 ft / 2.50 m
- Quarterdeck (15 %): 8.20 ft / 2.50 m
- Stern: 8.20 ft / 2.50 m
- Average freeboard: 8.91 ft / 2.72 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.9 %
- Above water (accommodation/working, high = better): 127.8 %
Waterplane Area: 1,251 Square feet or 116 Square metres
Displacement factor (Displacement / loading): 141 %
Structure weight / hull surface area: 23 lbs/sq ft or 110 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.76
- Longitudinal: 12.53
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
Breakdown of Miscellaneous Weights:
- 2 tons for ASDIC
- 9 tons for depth charge
Ships in Class:
- CSM-81: Built in Saigon Q1/1933
- CSM-82: Built in Saigon Q1/1933
- CSM-83: Built in Saigon Q1/1933
- CSM-84: Built in Saigon Q1/1933
- CSM-85: Built in Saigon Q1/1933
- CSM-86: Built in Saigon Q1/1933
- CSM-87: Built in Saigon Q1/1933
- CSM-88: Built in Saigon Q1/1933
- CSM-89: Built in Saigon Q1/1933
- CSM-90: Built in Saigon Q1/1933
- CSM-91: Built in Saigon Q2/1933
- CSM-92: Built in Saigon Q2/1933
- CSM-93: Built in Saigon Q2/1933
- CSM-94: Built in Saigon Q2/1933
- CSM-95: Built in Saigon Q2/1933
- CSM-96: Built in Saigon Q2/1933
- CSM-97: Built in Saigon Q2/1933
- CSM-98: Built in Saigon Q2/1933
- CSM-99: Built in Saigon Q2/1933
- CSM-100: Built in Saigon Q2/1933
- CSM-101: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-102: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-103: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-104: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-105: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-106: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-107: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-108: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-109: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-110: Built in Saigon Q3/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-111: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-112: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-113: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-114: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-115: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-116: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-117: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-118: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-119: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-120: Built in Saigon Q4/1933, transferred to Patrouille Navale Indochinoise, 1943
- CSM-121: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-122: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-123: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-124: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-125: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-126: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-127: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-128: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-129: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-130: Built in Saigon Q1/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-131: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-132: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-133: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-134: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-135: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-136: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-137: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-138: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-139: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-140: Built in Saigon Q2/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-141: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-142: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-143: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-144: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-145: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-146: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-147: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-148: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-149: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943
- CSM-150: Built in Saigon Q3/1934, transferred to Patrouille Navale Indochinoise, 1943