(Historical data)
Cajamarca (ex-Quechua) - laid down 1938
Loreto (ex-Quito) - laid down 1939
Both ships were re-named at the end of 1941.
(Built in Germany)
Displacement: 9,228 t light; 9,650 t standard; 10,610 t normal; 11,378 t full load
Dimensions: Length overall / water x beam x draught
642.27 ft / 623.36 ft x 63.16 ft x 18.86 ft (normal load)
195.76 m / 190.00 m x 19.25 m x 5.75 m
Armament:
15 - 5.91" / 150 mm guns (5x3 guns), 100.31lbs / 45.50kg shells, 1938 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 2 raised mounts - superfiring
12 - 4.13" / 105 mm guns (6x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Dual purpose guns in deck mounts
on side, evenly spread
8 - 0.79" / 20.0 mm guns (2x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Machine guns in deck mounts
on side ends, evenly spread, all raised mounts
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 1,963 lbs / 890 kg
Shells per gun, main battery: 180
16 - 21.0" / 533 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 405.18 ft / 123.50 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 2.76" / 70 mm 4.72" / 120 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm -
4th: 0.39" / 10 mm - -
5th: 0.39" / 10 mm - -
- Armour deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 75,098 shp / 56,023 Kw = 32.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,729 tons
Complement:
522 - 679
Cost:
£4.628 million / $18.514 million
Distribution of weights at normal displacement:
Armament: 250 tons, 2.4 %
Armour: 2,513 tons, 23.7 %
- Belts: 916 tons, 8.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 543 tons, 5.1 %
- Armour Deck: 993 tons, 9.4 %
- Conning Tower: 61 tons, 0.6 %
Machinery: 2,056 tons, 19.4 %
Hull, fittings & equipment: 4,248 tons, 40.0 %
Fuel, ammunition & stores: 1,382 tons, 13.0 %
Miscellaneous weights: 160 tons, 1.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,637 lbs / 7,093 Kg = 151.8 x 5.9 " / 150 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 3.5 ft / 1.1 m
Roll period: 14.3 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.87 : 1
'Natural speed' for length: 28.52 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 27.07 ft / 8.25 m
- Forecastle (20 %): 17.22 ft / 5.25 m
- Mid (50 %): 17.22 ft / 5.25 m
- Quarterdeck (15 %): 17.22 ft / 5.25 m
- Stern: 17.22 ft / 5.25 m
- Average freeboard: 18.01 ft / 5.49 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.8 %
- Above water (accommodation/working, high = better): 123.5 %
Waterplane Area: 27,278 Square feet or 2,534 Square metres
Displacement factor (Displacement / loading): 121 %
Structure weight / hull surface area: 106 lbs/sq ft or 520 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.04
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
30 tons reserved for radar
80 tons reserved for aircraft
50 tons reserved for future growth
As refitted, 1948
Cajamarca, Peruvian Light Cruiser laid down 1938
Displacement: 9,230 t light; 9,650 t standard; 10,610 t normal; 11,378 t full load
Dimensions: Length overall / water x beam x draught
642.27 ft / 623.36 ft x 63.16 ft x 18.86 ft (normal load) [195.76 m / 190.00 m x 19.25 m x 5.75 m]
Armament:
15 - 5.91" / 150 mm guns (5x3 guns), 100.31lbs / 45.50kg shells, 1938 Model Breech loading guns in turrets (on barbettes) on centerline ends, majority forward, 2 raised mounts - superfiring
12 - 4.13" / 105 mm guns (6x2 guns), 35.32lbs / 16.02kg shells, 1928 Model Dual purpose guns in deck mounts with hoists on side, evenly spread
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1929 Model Dual purpose guns in deck mounts on side, evenly spread
Weight of broadside 1,953 lbs / 886 kg
Shells per gun, main battery: 180
16 - 0.0" / 0 mm above water torpedoes, 533 - 0.0" / 0 mm submerged torpedo tubes
Armor:
Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 405.18 ft / 123.50 m 11.48 ft / 3.50 m
Ends: Unarmored
Main Belt covers 100 % of normal length
Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 3.11" / 79 mm 4.72" / 120 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 0.79" / 20 mm 0.39" / 10 mm -
Armor deck: 1.97" / 50 mm, Conning tower: 5.91" / 150 mm
Machinery:
Oil fired boilers, steam turbines, Geared drive, 2 shafts, 75,098 shp / 56,023 Kw = 32.00 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,729 tons
Complement: 522 - 679
Cost: £4.623 million / $18.493 million
Distribution of weights at normal displacement:
Armament: 249 tons, 2.3 %
Armor: 2,525 tons, 23.8 %
- Belts: 916 tons, 8.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 555 tons, 5.2 %
- Armor Deck: 993 tons, 9.4 %
- Conning Tower: 61 tons, 0.6 %
Machinery: 2,056 tons, 19.4 %
Hull, fittings & equipment: 4,239 tons, 40.0 %
Fuel, ammunition & stores: 1,380 tons, 13.0 %
Miscellaneous weights: 160 tons, 1.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship): 15,599 lbs / 7,076 Kg = 151.5 x 5.9 " / 150 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 3.4 ft / 1.1 m
Roll period: 14.3 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.87: 1
'Natural speed' for length: 28.52 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 27.07 ft / 8.25 m
- Forecastle (20 %): 17.22 ft / 5.25 m
- Mid (50 %): 17.22 ft / 5.25 m
- Quarterdeck (15 %): 17.22 ft / 5.25 m
- Stern: 17.22 ft / 5.25 m
- Average freeboard: 18.01 ft / 5.49 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.7 %
- Above water (accommodation/working, high = better): 171.4 %
Waterplane Area: 27,278 Square feet or 2,534 Square meters
Displacement factor (Displacement / loading): 121 %
Structure weight / hull surface area: 106 lbs/sq ft or 519 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.03
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Catapult, two scouting aircraft, and associated handling equipment - 80 tons
Air warning radar (update) - 25 tons
Surface search radar (update) - 25 tons
Fire control radar (update) - 30 tons
Cost to refit: 464 tons
Time to refit: 29 days
Cajamarca - Refit begun 1 January 1948, refit completed 30 January 1948
Loreto - Refit begun 1 April 1948, refit completed 30 April 1948