Arabe-class, French Aviso-dragueurs laid down 1943
The
Arabe-class aviso-dragueurs are a class of vessels combining the roles of minesweepers and surface escorts.
Displacement:
634 t light; 672 t standard; 837 t normal; 970 t full load
Dimensions: Length overall / water x beam x draught
234.32 ft / 229.66 ft x 27.89 ft x 10.17 ft (normal load)
71.42 m / 70.00 m x 8.50 m x 3.10 m
Armament:
2 - 3.94" / 100 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 78 lbs / 36 kg
Shells per gun, main battery: 450
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 8,405 shp / 6,270 Kw = 25.00 kts
Range 6,800nm at 15.00 kts
Bunker at max displacement = 298 tons
Complement:
77 - 101
Cost:
£0.391 million / $1.566 million
Distribution of weights at normal displacement:
Armament: 9 tons, 1.0 %
Armour: 3 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 217 tons, 25.9 %
Hull, fittings & equipment: 226 tons, 27.0 %
Fuel, ammunition & stores: 203 tons, 24.3 %
Miscellaneous weights: 180 tons, 21.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
547 lbs / 248 Kg = 17.9 x 3.9 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.9 ft / 0.3 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.13
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 8.24 : 1
'Natural speed' for length: 17.69 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.39 ft / 5.30 m
- Forecastle (25 %): 16.08 ft / 4.90 m
- Mid (50 %): 14.76 ft / 4.50 m (8.53 ft / 2.60 m aft of break)
- Quarterdeck (15 %): 8.53 ft / 2.60 m
- Stern: 8.53 ft / 2.60 m
- Average freeboard: 12.27 ft / 3.74 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 117.3 %
- Above water (accommodation/working, high = better): 119.7 %
Waterplane Area: 4,244 Square feet or 394 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.55
- Longitudinal: 2.94
- Overall: 0.65
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Breakdown of Miscellaneous Weights:
- 17 tons for electronics
- 15 tons for hydrophones and ASDIC
- 17 tons for depth charges (64x573-lb bombs)
- 25 tons for Lance roquettes anti-sous-marin de 265mm modèle 1942
- 10 tons for HVAC
- 16 tons for miscellaneous radio, electronics and ECM gear
- 20 tons for crew comforts
- 60 tons for minesweeping equipment
180 tons total miscellaneous weight
Electronics:
- DRBV-9 surface and air search radars (1 radar, 7 tons)
- DRBN-1 navigational surface and air search radar (1 radar, 2 tons)
- DRBC-3B fire-control radar (1 radar, 4 tons)
- DRBI-2R height-finding radar (1 radar, 3 tons)
- ARBR-1L radar warning receiver (1 ton)
- DUBV-7 active sonar (7.5 tons)
- DUBV-7B passive sonar (7.5 tons)
Ships in Class:
Arabe / Chi Lang Group
-
Arabe: Laid down at Nouméa July 1943, completed April 1944
-
Annamite: Laid down at Nouméa January 1944, completed October 1944
-
Algérien: Laid down at Nouméa July 1944, completed April 1945
-
Bambara: Laid down at Nouméa January 1945, completed October 1945
Kabyle / Tay Cay Group
-
Kabyle: Laid down at Nouméa July 1945, completed April 1946
-
Marocain: Laid down at Nouméa July 1945, completed April 1946
-
Tonkinois: Laid down at Nouméa January 1946, completed October 1946
-
Touareg: Laid down at Nouméa January 1946, completed October 1946
Arabe / Chi Lang Group
-
Chi Lang (ex-
Algérien): Laid down at Nouméa July 1943, completed April 1944
-
Van Kiep (ex-
Bambara): Laid down at Nouméa January 1944, completed October 1944
-
Dong Da: Laid down at Nouméa July 1944, completed April 1945
-
Tuy Dong: Laid down at Nouméa January 1945, completed October 1945
Kabyle / Tay Cay Group
-
Tay Cay: Laid down at Nouméa July 1946, completed April 1947
-
Can Don: Laid down at Nouméa July 1946, completed April 1947
-
Ngoc Hoi: Laid down at Saigon January 1947, completed October 1947
-
Bach Dang: Laid down at Saigon January 1947, completed October 1947