WesWorld

Repository for data pertaining to the subject.

(Historical data)

License-built copies of contemporaneous Bharati units, swapping light AA guns for normal calibers.

Y-1, laid down 1942
Y-2, laid down 1942
Y-3, laid down 1943
Y-4, laid down 1943

Enter ship name, Enter country Enter ship type laid down 1942

Displacement: 545 t light; 560 t standard; 618 t normal; 664 t full load

Dimensions: Length overall / water x beam x draught

184.11 ft / 173.88 ft x 28.71 ft x 7.87 ft (normal load)
56.12 m / 53.00 m x 8.75 m x 2.40 m

Armament:
1 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1942 Model Dual purpose gun in deck mount on centerline aft, 1 raised gun
2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1942 Model Anti-aircraft guns in deck mounts on side, all forward
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1942 Model Anti-aircraft guns in deck mounts on side, all aft
Weight of broadside 38 lbs / 17 kg
Shells per gun, main battery: 150

Armor:

- Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm -
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

Machinery:

Oil fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 1,627 ihp / 1,214 Kw = 15.88 kts
Range 5,000nm at 10.00 kts (Bunkerage = 103 tons)

Complement: 61 - 80

Cost: £0.226 million / $0.905 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.8 %
Armor: 3 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.5 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 89 tons, 14.4 %
Hull, fittings & equipment: 298 tons, 48.2 %
Fuel, ammunition & stores: 73 tons, 11.8 %
Miscellaneous weights: 150 tons, 24.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,000 lbs / 454 Kg = 28.3 x 4.1 " / 105 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 1.0 ft / 0.3 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.550
Length to Beam Ratio: 6.06: 1
'Natural speed' for length: 13.19 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.72 ft / 5.40 m
- Forecastle (20 %): 9.84 ft / 3.00 m (8.86 ft / 2.70 m aft of break)
- Mid (50 %): 8.86 ft / 2.70 m
- Quarterdeck (15 %): 8.86 ft / 2.70 m
- Stern: 8.86 ft / 2.70 m
- Average freeboard: 9.69 ft / 2.95 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.8 %
- Above water (accommodation/working, high = better): 96.4 %
Waterplane Area: 3,484 Square feet or 324 Square meters
Displacement factor (Displacement / loading): 167 %
Structure weight / hull surface area: 56 lbs/sq ft or 272 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 1.43
- Longitudinal: 4.19
- Overall: 1.59
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

(Historical data)

License-built copies of contemporaneous Bharati tugs, swapping out 35mm and 15mm AA guns for 40mm and 20m guns.

N-1, laid down 1942
N-2, laid down 1942
N-3, laid down 1942
N-4, laid down 1942
N-5, laid down 1943
N-6, laid down 1943

Enter ship name, Enter country Enter ship type laid down 1942

Displacement: 413 t light; 424 t standard; 462 t normal; 493 t full load

Dimensions: Length overall / water x beam x draught
162.73 ft / 162.73 ft x 26.25 ft x 6.89 ft (normal load)
49.60 m / 49.60 m x 8.00 m x 2.10 m

Armament:
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.89kg shells, 1942 Model Anti-aircraft guns in deck mount on centerline aft
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1942 Model Anti-aircraft guns in deck mounts on side, all forward
Weight of broadside 4 lbs / 2 kg
Shells per gun, main battery: 1,000

Armor:
- Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm 0.39" / 10 mm -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 900 shp / 672 Kw = 14.24 kts
Range 5,000nm at 10.00 kts (Bunkerage = 69 tons)

Complement:
49 - 64

Cost:
£0.115 million / $0.459 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.1 %
Armor: 1 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.2 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 24 tons, 5.1 %
Hull, fittings & equipment: 288 tons, 62.3 %
Fuel, ammunition & stores: 49 tons, 10.7 %
Miscellaneous weights: 100 tons, 21.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,515 lbs / 687 Kg = 1,157.9 x 1.4 " / 35 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 0.8 ft / 0.3 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.69

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 6.20: 1
'Natural speed' for length: 12.76 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 30
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: -1.64 ft / -0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15.75 ft / 4.80 m
- Forecastle (20 %): 11.81 ft / 3.60 m
- Mid (50 %): 7.87 ft / 2.40 m
- Quarterdeck (15 %): 7.87 ft / 2.40 m
- Stern: 7.87 ft / 2.40 m
- Average freeboard: 9.57 ft / 2.92 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 42.3 %
- Above water (accommodation/working, high = better): 101.8 %
Waterplane Area: 2,981 Square feet or 277 Square meters
Displacement factor (Displacement / loading): 307 %
Structure weight / hull surface area: 61 lbs/sq ft or 296 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 1.75
- Longitudinal: 6.02
- Overall: 1.98
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Selendon, Peruvian Harbor Tug laid down 1949

Displacement: 436 t light; 446 t standard; 491 t normal; 527 t full load

Dimensions: Length overall / water x beam x draught

180.34 ft / 174.87 ft x 30.02 ft x 6.23 ft (normal load) [54.97 m / 53.30 m x 9.15 m x 1.90 m]

Armament:

2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1949 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 500

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 647 shp / 482 Kw = 13.00 kts
Range 6,000nm at 10.00 kts
Bunker at max displacement = 81 tons

Complement: 51 - 67

Cost: £0.134 million / $0.535 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Machinery: 16 tons, 3.2 %
Hull, fittings & equipment: 340 tons, 69.3 %
Fuel, ammunition & stores: 55 tons, 11.2 %
Miscellaneous weights: 80 tons, 16.3 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 3,723 lbs / 1,689 Kg = 15,250.8 x 0.8 " / 20 mm shells or 2.5 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.1 ft / 0.3 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has low quarterdeck
Block coefficient: 0.525
Length to Beam Ratio: 5.83: 1
'Natural speed' for length: 13.22 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 34
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (15 %): 18.04 ft / 5.50 m
- Mid (25 %): 14.76 ft / 4.50 m
- Quarterdeck (60 %): 6.56 ft / 2.00 m (14.76 ft / 4.50 m before break)
- Stern: 6.56 ft / 2.00 m
- Average freeboard: 10.50 ft / 3.20 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 29.7 %
- Above water (accommodation/working, high = better): 206.1 %
Waterplane Area: 3,579 Square feet or 333 Square meters
Displacement factor (Displacement / loading): 439 %
Structure weight / hull surface area: 63 lbs/sq ft or 309 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 1.47
- Longitudinal: 5.73
- Overall: 1.68
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weight

Two auxiliary diesel-electric generating sets - 20 tons each - total 40 tons
Provision for stowed towing cables and winch aft - 30 tons
Navigation and communications equipment - 10 tons


Selendon – Laid down 1 October 1949; launched 6 December 1949; Completed 10 February 1950
Medina – Laid down 1 October 1949; launched 6 December 1949; Completed 10 February 1950

Caloyeras, Peruvian Civil Support Ship laid down 1949

Displacement: 419 t light; 432 t standard; 686 t normal; 889 t full load

Dimensions: Length overall / water x beam x draught

150.22 ft / 144.36 ft x 24.61 ft x 9.02 ft (normal load) [45.79 m / 44.00 m x 7.50 m x 2.75 m]

Armament:

1 - 0.79" / 20.0 mm gun in single mounts, 0.24lbs / 0.11kg shells, 1949 Model Anti-aircraft gun in deck mount on centerline forward
4 - 0.31" / 7.9 mm guns (2x2 guns), 0.02lbs / 0.01kg shells, 1949 Model Machine guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 300

Armor:

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: - 0.39" / 10 mm -

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 2,160 shp / 1,612 Kw = 16.00 kts
Range 10,000nm at 14.00 kts
Bunker at max displacement = 456 tons

Complement: 66 - 87

Cost: £0.168 million / $0.672 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Armor: 0 tons, 0.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 52 tons, 7.6 %
Hull, fittings & equipment: 246 tons, 35.9 %
Fuel, ammunition & stores: 267 tons, 39.0 %
Miscellaneous weights: 120 tons, 17.5 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 2,132 lbs / 967 Kg = 8,732.3 x 0.8 " / 20 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 0.7 ft / 0.2 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has raised quarterdeck
Block coefficient: 0.749
Length to Beam Ratio: 5.87: 1
'Natural speed' for length: 12.01 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 36
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 15.58 ft / 4.75 m
- Mid (50 %): 13.12 ft / 4.00 m
- Quarterdeck (15 %): 15.58 ft / 4.75 m (13.12 ft / 4.00 m before break)
- Stern: 15.58 ft / 4.75 m
- Average freeboard: 14.55 ft / 4.44 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 45.1 %
- Above water (accommodation/working, high = better): 117.4 %
Waterplane Area: 2,972 Square feet or 276 Square meters
Displacement factor (Displacement / loading): 305 %
Structure weight / hull surface area: 36 lbs/sq ft or 176 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 17.77
- Overall: 1.20
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Cargo simmed as bunkers - Actual radius 2,200 nm at 14 knots - 200 tons cargo.
Cargo represents 70 tons POL storage for distribution, 70 tons dry stores for distribution, 40 tons medical supplies for use or distribution, 20 tons fresh water in tanks with pumps

Breakdown of miscellaneous weight:

Accommodation for disaster response team - 30 tons
Expanded dispensary and medical facilities - 60 tons
Evaporators, generators and necessary shore connections - 30 tons


Caloyeras – Laid down 1 October 1949, launched 3 December 1949; Completed 4 February 1950
Noguera – Laid down 1 October 1949, launched 3 December 1949; Completed 4 February 1950