Antofagasta - LD 1905 - engine 1906 - com 1908
-16000t rebuilt as
Mayta Capac - recom nov 1918La Paz - LD 1908 - engine 1909 - com 1911
- 16000t rebuilt as
Huayna Capac - recom august 1919
Antofagasta class, Peru 12300t rebuilt to 16000t - Light BB laid down 1905 (Engine 1916)
Displacement:
16 000 t light; 16 866 t standard; 17 911 t normal; 18 747 t full load
Dimensions: Length overall / water x beam x draught
551.18 ft / 551.18 ft x 78.74 ft (Bulges 86.94 ft) x 21.24 ft (normal load)
168.00 m / 168.00 m x 24.00 m (Bulges 26.50 m) x 6.47 m
Armament:
6 - 13.39" / 340 mm guns (3x2 guns), 1 200.00lbs / 544.31kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
12 - 5.98" / 152 mm guns in single mounts, 107.15lbs / 48.60kg shells, 1905 Model
Breech loading guns in casemate mounts
on side, evenly spread, 4 raised mounts
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
Quick firing guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 8 540 lbs / 3 874 kg
Shells per gun, main battery: 104
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 357.61 ft / 109.00 m 9.19 ft / 2.80 m
Ends: 3.00" / 76 mm 177.17 ft / 54.00 m 8.01 ft / 2.44 m
16.40 ft / 5.00 m Unarmoured ends
Upper: 2.36" / 60 mm 367.45 ft / 112.00 m 7.55 ft / 2.30 m
Main Belt covers 100 % of normal length
- Torpedo Bulkhead and Bulges:
1.18" / 30 mm 367.45 ft / 112.00 m 20.96 ft / 6.39 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.6" / 320 mm 3.94" / 100 mm 11.0" / 280 mm
2nd: 2.36" / 60 mm - -
3rd: 0.79" / 20 mm - -
4th: 0.50" / 13 mm - -
- Armour deck: 2.95" / 75 mm, Conning tower: 11.02" / 280 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 34 000 shp / 25 364 Kw = 22.39 kts
Range 7 000nm at 12.00 kts
Bunker at max displacement = 1 881 tons
Complement:
773 - 1 006
Cost:
£1.634 million / $6.534 million
Distribution of weights at normal displacement:
Armament: 1 067 tons, 6.0 %
Armour: 6 044 tons, 33.7 %
- Belts: 2 236 tons, 12.5 %
- Torpedo bulkhead: 337 tons, 1.9 %
- Armament: 1 549 tons, 8.6 %
- Armour Deck: 1 760 tons, 9.8 %
- Conning Tower: 163 tons, 0.9 %
Machinery: 1 267 tons, 7.1 %
Hull, fittings & equipment: 7 283 tons, 40.7 %
Fuel, ammunition & stores: 1 910 tons, 10.7 %
Miscellaneous weights: 340 tons, 1.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
25 703 lbs / 11 659 Kg = 21.4 x 13.4 " / 340 mm shells or 4.7 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 4.2 ft / 1.3 m
Roll period: 17.7 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.25
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.616
Length to Beam Ratio: 6.34 : 1
'Natural speed' for length: 23.48 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.62 ft / 7.20 m
- Forecastle (21 %): 22.64 ft / 6.90 m
- Mid (50 %): 22.31 ft / 6.80 m (13.78 ft / 4.20 m aft of break)
- Quarterdeck (20 %): 13.78 ft / 4.20 m
- Stern: 13.78 ft / 4.20 m
- Average freeboard: 18.24 ft / 5.56 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.2 %
- Above water (accommodation/working, high = better): 129.7 %
Waterplane Area: 32 219 Square feet or 2 993 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 160 lbs/sq ft or 783 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.34
- 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
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Autofagasta - LD 1905 - engine 1906 - in service 1908
La Paz - LD 1908 - engine 1909 - in service 1911

Autofagasta class, Peru 12300T BB laid down 1905 (Engine 1906)
Displacement:
12 300 t light; 12 940 t standard; 13 884 t normal; 14 639 t full load
Dimensions: Length overall / water x beam x draught
492.13 ft / 492.13 ft x 78.74 ft x 21.08 ft (normal load)
150.00 m / 150.00 m x 24.00 m x 6.42 m
Armament:
4 - 13.39" / 340 mm guns (2x2 guns), 1 200.00lbs / 544.31kg shells, 1905 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
10 - 5.98" / 152 mm guns in single mounts, 107.15lbs / 48.60kg shells, 1905 Model
Breech loading guns in casemate mounts
on side, evenly spread
8 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1905 Model
Quick firing guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 6 050 lbs / 2 744 kg
Shells per gun, main battery: 104
4 - 18.0" / 457.2 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.6" / 320 mm 328.08 ft / 100.00 m 9.19 ft / 2.80 m
Ends: 3.00" / 76 mm 124.67 ft / 38.00 m 8.01 ft / 2.44 m
39.37 ft / 12.00 m Unarmoured ends
Upper: 2.36" / 60 mm 328.08 ft / 100.00 m 7.55 ft / 2.30 m
Main Belt covers 103 % of normal length
- Torpedo Bulkhead:
1.18" / 30 mm 328.08 ft / 100.00 m 20.96 ft / 6.39 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.6" / 320 mm 3.94" / 100 mm 11.0" / 280 mm
2nd: 2.36" / 60 mm - -
3rd: 0.79" / 20 mm - -
4th: 0.50" / 13 mm - -
- Armour deck: 2.95" / 75 mm, Conning tower: 11.02" / 280 mm
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 19 300 shp / 14 398 Kw = 20.02 kts
Range 7 000nm at 10.00 kts
Bunker at max displacement = 1 699 tons
Complement:
639 - 831
Cost:
£1.241 million / $4.963 million
Distribution of weights at normal displacement:
Armament: 756 tons, 5.4 %
Armour: 4 854 tons, 35.0 %
- Belts: 2 022 tons, 14.6 %
- Torpedo bulkhead: 301 tons, 2.2 %
- Armament: 854 tons, 6.1 %
- Armour Deck: 1 541 tons, 11.1 %
- Conning Tower: 137 tons, 1.0 %
Machinery: 1 253 tons, 9.0 %
Hull, fittings & equipment: 5 087 tons, 36.6 %
Fuel, ammunition & stores: 1 584 tons, 11.4 %
Miscellaneous weights: 350 tons, 2.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
18 632 lbs / 8 451 Kg = 15.5 x 13.4 " / 340 mm shells or 3.4 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 5.1 ft / 1.6 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.39
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.595
Length to Beam Ratio: 6.25 : 1
'Natural speed' for length: 22.18 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.34 ft / 6.20 m
- Forecastle (18 %): 17.06 ft / 5.20 m
- Mid (50 %): 13.78 ft / 4.20 m
- Quarterdeck (18 %): 13.78 ft / 4.20 m
- Stern: 13.78 ft / 4.20 m
- Average freeboard: 15.13 ft / 4.61 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.3 %
- Above water (accommodation/working, high = better): 122.8 %
Waterplane Area: 28 209 Square feet or 2 621 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 136 lbs/sq ft or 664 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.38
- 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