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1

Wednesday, January 18th 2017, 7:48pm

Marina de Guerra del Perú – Small Auxiliary Vessels

Repository for data pertaining to the subject.

2

Wednesday, January 18th 2017, 7:49pm

Y-1 Class Netlayer/Boom Defense Ship

(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

3

Wednesday, January 18th 2017, 7:53pm

N-1 Class Harbor Tug

(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