WesWorld

Anti Submarine Warfare Vessels

BCS 1 Class, Iberia, Buque de Contra Submarino, laid down 1935

BCS 1 to BCS 40

Displacement:
576 t light; 599 t standard; 709 t normal; 796 t full load

Dimensions: Length overall / water x beam x draught
244.30 ft / 229.66 ft x 36.09 ft x 6.56 ft (normal load)
74.46 m / 70.00 m x 11.00 m x 2.00 m

Armament:
1 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.40kg shells, 1932 Model
Dual purpose gun in a deck mount with hoist
on centreline forward
2 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1930 Model
Dual purpose guns in deck mounts
on side, all amidships
2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1930 Model
Dual purpose guns in deck mount
on centreline aft
4 - 0.98" / 25.0 mm guns (2x2 guns), 0.48lbs / 0.22kg shells, 1933 Model
Dual purpose guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 92 lbs / 42 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm -
3rd: 0.79" / 20 mm 0.79" / 20 mm -
4th: 0.79" / 20 mm 0.79" / 20 mm -

- Conning tower: 1.97" / 50 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 3,864 shp / 2,883 Kw = 20.00 kts
Range 7,000nm at 12.00 kts
Bunker at max displacement = 197 tons

Complement:
68 - 89

Cost:
£0.230 million / $0.919 million

Distribution of weights at normal displacement:
Armament: 11 tons, 1.6 %
Armour: 14 tons, 2.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 11 tons, 1.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.5 %
Machinery: 110 tons, 15.5 %
Hull, fittings & equipment: 376 tons, 53.0 %
Fuel, ammunition & stores: 132 tons, 18.7 %
Miscellaneous weights: 65 tons, 9.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,903 lbs / 863 Kg = 28.4 x 5.1 " / 130 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.14
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.456
Length to Beam Ratio: 6.36 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.69 ft / 6.00 m
- Forecastle (20 %): 14.76 ft / 4.50 m
- Mid (68 %): 14.76 ft / 4.50 m (6.56 ft / 2.00 m aft of break)
- Quarterdeck (15 %): 6.56 ft / 2.00 m
- Stern: 6.56 ft / 2.00 m
- Average freeboard: 12.53 ft / 3.82 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 73.6 %
- Above water (accommodation/working, high = better): 187.8 %
Waterplane Area: 5,313 Square feet or 494 Square metres
Displacement factor (Displacement / loading): 182 %
Structure weight / hull surface area: 48 lbs/sq ft or 233 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 3.19
- Overall: 1.01
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

BCS 1 class is designed for prolonged patrols, normally of 21 days, with reserves for pursuits at top speed.
65 tons misc. weight includes......
10 tons - SONAR
20 tons - Depth charges, racks & projectors
5 tons - Forward mortar thrower

BCS 41 Class, Iberia, Buque de Contra Submarino, laid down 1937

BCS 41 to BCS 90

Displacement:
375 t light; 391 t standard; 433 t normal; 467 t full load

Dimensions: Length overall / water x beam x draught
195.09 ft / 180.45 ft x 27.89 ft x 6.56 ft (normal load)
59.46 m / 55.00 m x 8.50 m x 2.00 m

Armament:
1 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.40kg shells, 1932 Model
Dual purpose gun in a deck mount with hoist
on centreline forward
2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1930 Model
Dual purpose guns in deck mount
on centreline aft, all raised guns - superfiring
8 - 0.98" / 25.0 mm guns (4x2 guns), 0.48lbs / 0.22kg shells, 1930 Model
Dual purpose guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
Weight of broadside 82 lbs / 37 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm 0.79" / 20 mm -
3rd: 0.79" / 20 mm 0.79" / 20 mm -

- Conning tower: 1.97" / 50 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 2,549 shp / 1,902 Kw = 20.00 kts
Range 4,000nm at 12.00 kts
Bunker at max displacement = 76 tons

Complement:
46 - 61

Cost:
£0.173 million / $0.690 million

Distribution of weights at normal displacement:
Armament: 10 tons, 2.4 %
Armour: 12 tons, 2.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 10 tons, 2.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 2 tons, 0.6 %
Machinery: 71 tons, 16.3 %
Hull, fittings & equipment: 231 tons, 53.4 %
Fuel, ammunition & stores: 58 tons, 13.5 %
Miscellaneous weights: 50 tons, 11.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
869 lbs / 394 Kg = 13.0 x 5.1 " / 130 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.7 ft / 0.2 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.35
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.459
Length to Beam Ratio: 6.47 : 1
'Natural speed' for length: 16.02 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.69 ft / 6.00 m
- Forecastle (20 %): 14.76 ft / 4.50 m
- Mid (56 %): 14.76 ft / 4.50 m (6.56 ft / 2.00 m aft of break)
- Quarterdeck (15 %): 6.56 ft / 2.00 m
- Stern: 6.56 ft / 2.00 m
- Average freeboard: 11.51 ft / 3.51 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 84.5 %
- Above water (accommodation/working, high = better): 153.6 %
Waterplane Area: 3,360 Square feet or 312 Square metres
Displacement factor (Displacement / loading): 152 %
Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 5.71
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

BCS 41 class is designed to operate with the BCS 1 class, in a ratio of 2:1. They have a patrol duration of 14 days.
50 tons misc. weight includes......
10 tons - SONAR
10 tons - Depth charges, racks & projectors
5 tons - Forward mortar thrower