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1

Wednesday, January 18th 2017, 1:40am

Marina de Guerra del Perú – Logistics and Amphibious Vessels

Repository for information pertaining to the subject

2

Wednesday, January 18th 2017, 1:43am

L-1 class Landing Craft (Infantry)

(Historical data)

L-1, Peruvian Landing Craft, laid down 1941

Displacement: 277 t light; 284 t standard; 325 t normal; 358 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

160.37 ft / 157.48 ft) x 22.97 ft x (5.25 / 5.68 ft [48.88 m / 48.00 m) x 7.00 m x (1.60 / 1.73 m]

Armament:

3 - 0.79" / 20.0 mm 45.0 cal guns - 0.25lbs / 0.11kg shells, 2,000 per gun Anti-air guns in deck mounts, 1941 Model
2 x Single mounts on sides, forward deck centre
1 x Single mount on centreline, aft deck centre
Weight of broadside 1 lbs / 0 kg

Armour:

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm - -

Conning towers: Forward 0.59" / 15 mm, Aft 0.00" / 0 mm

Machinery:

Diesel Internal combustion motors, Direct drive, 2 shafts, 700 shp / 522 Kw = 13.99 kts
Range 4,000nm at 12.00 kts
Bunker at max displacement = 74 tons

Complement: 37 - 49

Cost: £0.077 million / $0.306 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.1 %
Guns: 0 tons, 0.1 %
Armour: 3 tons, 0.9 %
Armament: 2 tons, 0.7 %
Conning Tower: 1 tons, 0.2 %
Machinery: 18 tons, 5.7 %
Hull, fittings & equipment: 159 tons, 48.7 %
Fuel, ammunition & stores: 48 tons, 14.9 %
Miscellaneous weights: 97 tons, 29.8 %
- Hull above water: 90 tons
- On freeboard deck: 7 tons

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 1,408 lbs / 639 Kg = 5,769.1 x 0.8 " / 20 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 0.7 ft / 0.2 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has a flush deck, a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.600 / 0.610
Length to Beam Ratio: 6.86 : 1
'Natural speed' for length: 12.55 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 25
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 16.40 ft / 5.00 m, 13.12 ft / 4.00 m
- Forward deck: 30.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Aft deck: 35.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Quarter deck: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Average freeboard: 13.39 ft / 4.08 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 50.2 %
- Above water (accommodation/working, high = better): 178.7 %
Waterplane Area: 2,645 Square feet or 246 Square metres
Displacement factor (Displacement / loading): 236 %
Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.74
- Longitudinal: 13.68
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Excellent seaboat, comfortable, can fire her guns in the heaviest weather


L-1, laid down 1941
L-2, laid down 1941
L-3, laid down 1942
L-4, laid down 1942
L-5, laid down 1942
L-6, laid down 1943
L-7, laid down 1943
L-8, laid down 1944

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Wednesday, January 18th 2017, 2:31am

Santillana class Coastal Transport

Santillana, Peruvian Coastal Transport laid down 1945

Displacement: 1,189 t light; 1,220 t standard; 1,563 t normal; 1,837 t full load

Dimensions: Length overall / water x beam x draught

215.04 ft / 209.97 ft x 36.09 ft x 13.12 ft (normal load) [65.54 m / 64.00 m x 11.00 m x 4.00 m]

Armament:

4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1945 Model Anti-aircraft guns in deck mounts on side, all aft
Weight of broadside 1 lbs / 0 kg
Shells per gun, main battery: 1,000

Armour:

Conning tower: 0.98" / 25 mm

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 1,858 shp / 1,386 Kw = 14.50 kts
Range 15,000nm at 12.00 kts
Bunker at max displacement = 616 tons

Complement: 123 - 161

Cost: £0.334 million / $1.334 million

Distribution of weights at normal displacement:

Armament: 0 tons, 0.0 %
Armour: 3 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 47 tons, 3.0 %
Hull, fittings & equipment: 839 tons, 53.7 %
Fuel, ammunition & stores: 374 tons, 23.9 %
Miscellaneous weights: 300 tons, 19.2 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 5,511 lbs / 2,500 Kg = 22,576.7 x 0.8 " / 20 mm shells or 2.8 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.3 ft / 0.4 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has rise forward of midbreak, raised quarterdeck
Block coefficient: 0.550
Length to Beam Ratio: 5.82: 1
'Natural speed' for length: 14.49 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 35
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: 15.58 ft / 4.75 m
- Forecastle (15 %): 13.94 ft / 4.25 m
- Mid (50 %): 13.94 ft / 4.25 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (20 %): 13.94 ft / 4.25 m (9.84 ft / 3.00 m before break)
- Stern: 13.94 ft / 4.25 m
- Average freeboard: 12.81 ft / 3.91 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 32.2 %
- Above water (accommodation/working, high = better): 98.7 %
Waterplane Area: 5,288 Square feet or 491 Square metres
Displacement factor (Displacement / loading): 393 %
Structure weight / hull surface area: 95 lbs/sq ft or 462 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.86
- Longitudinal: 7.41
- Overall: 2.13
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

Low-stowed cargo simmed as additional bunkers - true radius 2,500 nm on bunkers of 64 tons (BAM 114)

Breakdown of miscellaneous weight:

Provision for cargo handling gear (two derricks): 30 tons
Provision of quarters for 50 troops over short distances: 100 tons
Provision for deck cargo: 170 tons

Low stowed cargo - 450 tons including deep tanks for 2 x 50 tons liquid cargo


Vessel -:- Laid Down -:- Launched -:- Completed

Santillana -:- 1-Jan-45 -:- 30-Jun-45 -:- 3-Nov-45
Herrera -:- 1-Jan-45 -:- 30-Jun-45 -:- 3-Nov-45
Parocha -:- 1-Jan-46 -:- 30-Jun-46 -:- 3-Nov-46

4

Friday, January 20th 2017, 3:04pm

Biru class Cargo Ship

Biru, Peruvian Coastal Freighter laid down 1943

Displacement: 2,400 t light; 2,496 t standard; 4,530 t normal; 6,157 t full load

Dimensions: Length overall / water x beam x draught

282.25 ft / 269.03 ft x 45.93 ft x 23.62 ft (normal load) [86.03 m / 82.00 m x 14.00 m x 7.20 m]

Armament:

1 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1943 Model Dual purpose gun in deck mount on centreline forward, 1 raised gun
4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1943 Model Anti-aircraft guns in deck mounts on side, all aft, all raised mounts - superfiring
Weight of broadside 36 lbs / 16 kg
Shells per gun, main battery: 250

Machinery:

Diesel Internal combustion motors, Geared drive, 1 shaft, 1,644 shp / 1,226 Kw = 12.00 kts
Range 76,750nm at 10.00 kts
Bunker at max displacement = 3,662 tons

Complement: 275 - 358

Cost: £0.614 million / $2.455 million

Distribution of weights at normal displacement:

Armament: 5 tons, 0.1 %
Machinery: 42 tons, 0.9 %
Hull, fittings & equipment: 1,353 tons, 29.9 %
Fuel, ammunition & stores: 2,130 tons, 47.0 %
Miscellaneous weights: 1,000 tons, 22.1 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 15,254 lbs / 6,919 Kg = 431.9 x 4.1 " / 105 mm shells or 4.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.9 ft / 0.6 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:

Hull has raised forecastle
Block coefficient: 0.543
Length to Beam Ratio: 5.86 : 1
'Natural speed' for length: 16.40 kts
Power going to wave formation at top speed: 34 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (10 %): 21.33 ft / 6.50 m (14.76 ft / 4.50 m aft of break)
- Mid (30 %): 14.76 ft / 4.50 m
- Quarterdeck (30 %): 21.33 ft / 6.50 m
- Stern: 21.33 ft / 6.50 m
- Average freeboard: 18.70 ft / 5.70 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 29.4 %
- Above water (accommodation/working, high = better): 97.5 %
Waterplane Area: 8,300 Square feet or 771 Square metres
Displacement factor (Displacement / loading): 404 %
Structure weight / hull surface area: 80 lbs/sq ft or 388 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.10
- Longitudinal: 7.57
- Overall: 1.33
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

Low-stowed cargo simmed as additional bunkers. Normal radius 7,500 nm at 10 knots, bunkers of 219 tons. Remaining bunkers - ~1,800 tons - cargo

Breakdown of Miscellaneous weight:

Cargo handling gear - 150 tons
Anticipated deck cargo - 850 tons


Biru - acquired and converted 1943
Urubamba (ex Presidente Ramon Castilla) - acquired and converted 1943

5

Friday, March 17th 2017, 2:44am

Lancha de desembarco de Infanteria

Displacement: 63 tons (light) 100 tons (loaded)
Length: 32.03 meters
Beam: 6.50 meters
Draught: 0.86 meters (forward), 1.12 meters (aft) (loaded)
Propulsion: Two 1,500 hp supercharged diesel engines. Twin screws.
Speed: 15 knots maximum, 13.25 knots
Range: 330 nm (610 km) at 15 knots; 700 nm at 12.5 knots.
Complement: Crew: 2 officers and 15 men with accommodation.
Troops: 6 officers and 96 men fully equipped below deck.
Armament: 2 × 20 mm autocannon, 2 x 7.65mm machineguns.
Armor: 10mm plating to deck sides, gun positions, generator house and forward bulkhead


LDI Nr. 101 - 103: Constructed in 1st Quarter 1948
LDI Nr. 105 - 107: Constructed in 2nd Quarter 1948

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Friday, March 17th 2017, 2:46am

Lancha de desembarco de Apoyo

Displacement: 63 tons (light) 100 tons (loaded)
Length: 32.03 meters
Beam: 6.50 meters
Draught: 0.86 meters (forward), 1.12 meters (aft) (loaded)
Propulsion: Two 1,500 hp supercharged diesel engines. Twin screws.
Speed: 15 knots maximum, 13.25 knots
Range: 330 nm (610 km) at 15 knots; 700 nm at 12.5 knots.
Complement: Crew: 2 officers and 30 men with accommodation.
Armament: 1 × 37 mm antiaircraft gun, 1 x 81mm mortar, 2 x 7.65mm machineguns.
Armor: 15mm plating to deck sides, gun positions, generator house and forward bulkhead


LDA Nr.104: Constructed in the 1st Quarter 1948
LDS Nr.108: Constructed in the 2nd Quarter 1948