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Fleet list

CLAA Almirante José Prudencio Pidila, laid down October 1942
CLAA General Antonio Nariño, laid down October 1942
CLAA Almirante Tono, laid down October 1942

CLAA Buenaventura, laid down 1936

Almirante Brión, projected for 1943
Almirante Garcia, projected for 1943
since classed as cruisers 1st class

CLAA Pereira (ex-Eclipse) purchased 1943 Popayan
CLAA Popayan (ex-Orca) purchased 1943
CLAA Tunja (ex-Fortaleza) purchased 1943
CLAA Yopal (ex-Champion) purchased 1942
CL Sogamoso (ex-Active) purchased in 1940

CL Carabobo (Ex-Undaunted, purchased 1932)
CL Junin (Ex-Inconstant, purchased 1932)

Ships cancelled or no longer in service

CL General Pinzon, projected for 1938 (since cancelled)
CL General Antonio Nerino, projected for 1938 (since cancelled)
both orriginally projected for 1936, delayed by purchase of various used ships and ultimately cancelled.
A third name was briefly considered for one of the ships, General Ramón González Valencia.

CL Francisco de Miranda (ex-Ministro Zentento), scrapped 1940
CL Colonel Atanasio Gerardot (ex-Presidente Errazuriz), scrapped 1940
CL Domingo Caycedo (ex-Blanco Encalado), scrapped 1940

Intended to be built in as early as 1936, the building of the CL's General Pinzon and General Nerino had been delayed several times due to lack of funds and resources in addition to the purchase of several surplus cruisers from several world navy's as the opertunity presented itself.

The ships were intended to be based on the successfull Atlantean Zerberus design, instead using 9x5.5" as a main armament. A considerable amount of money was paid for the design work from Atlantis. The designs were never laid down however as there was some disagreement on the use of the main armament of 5.5". Allthough a caliber already in use on several transfered vessels, some in the Colombian Navy wanted a larger caliber adopted as other world navy's had already adopted guns in the 6-8" range.


Finally in 1941 it was decided that they would be cancelled, Atlantis agreed to transfer several older cruisers into the Colombian navy at a considerably cheap cost as a refund in addition to transfering the plans of the improved Zerberus class design and the 5.1" gun design which was proving to be quite successful in Atlantean service.

In 1941, three ships were ordered by the Colombian navy under the improved Zerberus design, two ships tentatively using the General Pinzon/General Nerino names. Since then two new names have been preposed, Admiral Pidila and Admiral Joly, the 3rd ship yet to be named. Finally three ships were laid down with the names Almirante José Prudencio Pidila, General Antonio Nariño and Almirante Tono.

Modified Zerberus/Nemesis class or Almirante class

Ships in class: Almirante Padila, General Nariño, Almirante Tono
Displacement:
5,906 t light; 6,211 t standard; 6,928 t normal; 7,501 t full load

Dimensions: Length overall / water x beam x draught
542.17 ft / 528.00 ft x 51.50 ft x 18.50 ft (normal load)
165.25 m / 160.93 m x 15.70 m x 5.64 m

Armament:
12 - 5.10" / 130 mm guns (6x2 guns), 66.33lbs / 30.08kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 2 raised mounts
8 - 1.58" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 1.58" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread, 1 raised mount
36 - 0.79" / 20.0 mm guns (7x4, 8x1 guns), 0.24lbs / 0.11kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 9 raised mounts
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1940 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 829 lbs / 376 kg
Shells per gun, main battery: 350
10 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.35" / 60 mm 345.00 ft / 105.16 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 101 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.58" / 40 mm 0.79" / 20 mm 1.58" / 40 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 1.58" / 40 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 63,279 shp / 47,206 Kw = 32.39 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,291 tons

Complement:
379 - 493

Cost:
£3.184 million / $12.734 million

Distribution of weights at normal displacement:
Armament: 104 tons, 1.5 %
Armour: 944 tons, 13.6 %
- Belts: 331 tons, 4.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 49 tons, 0.7 %
- Armour Deck: 540 tons, 7.8 %
- Conning Tower: 25 tons, 0.4 %
Machinery: 1,692 tons, 24.4 %
Hull, fittings & equipment: 3,086 tons, 44.5 %
Fuel, ammunition & stores: 1,022 tons, 14.8 %
Miscellaneous weights: 80 tons, 1.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,583 lbs / 4,347 Kg = 144.5 x 5.1 " / 130 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 2.3 ft / 0.7 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.482
Length to Beam Ratio: 10.25 : 1
'Natural speed' for length: 26.23 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.20 ft / 7.68 m
- Forecastle (20 %): 19.00 ft / 5.79 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (15 %): 19.00 ft / 5.79 m
- Stern: 19.00 ft / 5.79 m
- Average freeboard: 19.50 ft / 5.94 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 94.0 %
- Above water (accommodation/working, high = better): 132.1 %
Waterplane Area: 18,531 Square feet or 1,722 Square metres
Displacement factor (Displacement / loading): 132 %
Structure weight / hull surface area: 97 lbs/sq ft or 471 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.07
- Longitudinal: 2.14
- Overall: 1.15
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

20 tons for improved gun dirrectors
20 tons for torpedo's
10 tons for torpedo handling equipment
30 tons for Radars

Modifications mainly involve reducing topweight by lowering the main gun mounts and superstructure in an effort to increase the number of AA without any negative effect.

Buenaventura, Colombian Anti-aircraft cruiser laid down 1936 (Atlantean Zerberus class)


Buenaventura

Displacement:
5,719 t light; 5,946 t standard; 6,688 t normal; 7,281 t full load

Dimensions: Length overall / water x beam x draught
539.17 ft / 525.00 ft x 50.00 ft x 18.50 ft (normal load)
164.34 m / 160.02 m x 15.24 m x 5.64 m

Armament:
12 - 5.10" / 130 mm guns (6x2 guns), 66.33lbs / 30.09kg shells, 1934 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 4 raised mounts
8 - 1.58" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.88kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
4 - 1.58" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread, 1 raised mount
16 - 0.79" / 20.0 mm guns (4x4 guns), 0.24lbs / 0.11kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.50" / 12.7 mm guns (6x2 guns), 0.06lbs / 0.03kg shells, 1934 Model
Machine guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 824 lbs / 374 kg
Shells per gun, main battery: 200
10 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.35" / 60 mm 345.00 ft / 105.16 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 101 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.58" / 40 mm 0.79" / 20 mm 1.58" / 40 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 1.58" / 40 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 62,000 shp / 46,252 Kw = 32.39 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 1,335 tons

Complement:
369 - 480

Cost:
£2.633 million / $10.533 million

Distribution of weights at normal displacement:
Armament: 103 tons, 1.5 %
Armour: 924 tons, 13.8 %
- Belts: 330 tons, 4.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 49 tons, 0.7 %
- Armour Deck: 521 tons, 7.8 %
- Conning Tower: 24 tons, 0.4 %
Machinery: 1,784 tons, 26.7 %
Hull, fittings & equipment: 2,828 tons, 42.3 %
Fuel, ammunition & stores: 969 tons, 14.5 %
Miscellaneous weights: 80 tons, 1.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,635 lbs / 3,917 Kg = 130.2 x 5.1 " / 130 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 2.2 ft / 0.7 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.25

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.482
Length to Beam Ratio: 10.50 : 1
'Natural speed' for length: 26.10 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.20 ft / 7.68 m
- Forecastle (20 %): 19.00 ft / 5.79 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (15 %): 19.00 ft / 5.79 m
- Stern: 19.00 ft / 5.79 m
- Average freeboard: 19.50 ft / 5.94 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 100.5 %
- Above water (accommodation/working, high = better): 129.4 %
Waterplane Area: 17,889 Square feet or 1,662 Square metres
Displacement factor (Displacement / loading): 124 %
Structure weight / hull surface area: 89 lbs/sq ft or 436 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 2.09
- Overall: 1.06
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

20 tons for improved gun dirrectors
20 tons for torpedo's
10 tons for torpedo handling equipment
10 tons for Radar
20 tons for future growth

Active class CL 1922
Sold to Colombia in May 1940

*current refit*
Forward superstructure remodeled , new main armament of 5.5" guns to conform with CL standards, new 3" and 1" twin mounts added, new directors added, catapult added amidships and twin 21' torpedo mounts replaced with triples.



CL Sogamoso (ex-Active), Colombian (ex-Atlantean) cruiser laid down 1916 (refitted 1921)

Displacement:
7,553 t light; 7,774 t standard; 8,516 t normal; 9,074 t full load
Loading submergence 616 tons/feet

Dimensions:
565.00 ft x 58.00 ft x 17.00 ft (normal load)
172.21 m x 17.68 m x 5.18 m

Armament:
6 - 5.50" / 140 mm guns (6x1)
8 - 3.00" / 76 mm AA guns (4x2)
8 - 1.00" / 25 mm guns (4x2)
Weight of broadside 611 lbs / 277 kg
6 - 21.0" / 533.4 mm above water torpedoes (2x3)

Armour:
Belt 3.94" / 100 mm, end belts 1.57" / 40 mm
Belts cover 120 % of normal area
Main gun shields 1.57" / 40 mm
Armour deck 1.57" / 40 mm, Conning tower 3.94" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 70,234 shp / 52,395 Kw = 31.00 kts
Range 8,000nm at 12.00 kts

Complement:
443 - 576

Cost:
£1.137 million / $4.548 million

Distribution of weights at normal displacement:
Armament: 76 tons, 0.9 %
Armour: 1,460 tons, 17.1 %
Belts: 778 tons, 9.1 %, Armament: 20 tons, 0.2 %, Armour Deck: 626 tons, 7.4 %
Conning Tower: 35 tons, 0.4 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,617 tons, 30.7 %
Hull, fittings & equipment: 3,350 tons, 39.3 %
Fuel, ammunition & stores: 963 tons, 11.3 %
Miscellaneous weights: 50 tons, 0.6 %

Metacentric height 3.4

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.26
Shellfire needed to sink: 10,121 lbs / 4,591 Kg = 121.7 x 5.5 " / 140 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.09
Relative quality as seaboat: 1.19

Hull form characteristics:
Block coefficient: 0.535
Sharpness coefficient: 0.35
Hull speed coefficient 'M': 8.46
'Natural speed' for length: 23.77 kts
Power going to wave formation at top speed: 57 %
Trim: 59
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 107.6 %
Relative accommodation and working space: 161.9 %
(Average = 100%)
Displacement factor: 116 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.07
(Structure weight / hull surface area: 96 lbs / square foot or 470 Kg / square metre)
Relative longitudinal hull strength: 1.34
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment 5.34 ft)
Relative composite hull strength: 1.10

Pereira and Popayan (ex-Eclipse and Orca), Colombian (ex-Argentinian, ex-Atlantean) CLAA laid down 1916, refitted 1933, purchased 1943

Displacement:
4,790 t light; 4,991 t standard; 5,228 t normal; 5,417 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
6 - 5.10" / 130 mm guns (4 mounts), 66.33lbs / 30.09kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 2 raised mounts
Aft Main mounts separated by engine room
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, 2 raised mounts
4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 536 lbs / 243 kg
Shells per gun, main battery: 300
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.00" / 25 mm 1.57" / 40 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 427 tons

Complement:
306 - 399

Cost:
£0.771 million / $3.084 million

Distribution of weights at normal displacement:
Armament: 67 tons, 1.3 %
Armour: 938 tons, 17.9 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 34 tons, 0.7 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,766 tons, 33.8 %
Hull, fittings & equipment: 1,979 tons, 37.9 %
Fuel, ammunition & stores: 438 tons, 8.4 %
Miscellaneous weights: 40 tons, 0.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,710 lbs / 2,136 Kg = 71.0 x 5.1 " / 130 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.7 ft / 0.8 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.4 %
- Above water (accommodation/working, high = better): 124.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 104 %
Structure weight / hull surface area: 80 lbs/sq ft or 390 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.36
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

-------------------------------------------------------------

Tunja (ex-Forward, ex-Fortaleza), Colombian (exArgentinian, ex-Atlantean) CLAA laid down 1916 refitted 1933, purchased 1943

Displacement:
4,790 t light; 4,991 t standard; 5,228 t normal; 5,417 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
6 - 5.10" / 130 mm guns (5 mounts), 66.33lbs / 30.09kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 1 raised mount
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
6 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 535 lbs / 243 kg
Shells per gun, main battery: 300
6 - 23.6" / 600 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.00" / 25 mm 1.57" / 40 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 427 tons

Complement:
306 - 399

Cost:
£0.771 million / $3.083 million

Distribution of weights at normal displacement:
Armament: 67 tons, 1.3 %
Armour: 938 tons, 17.9 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 34 tons, 0.7 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,766 tons, 33.8 %
Hull, fittings & equipment: 1,959 tons, 37.5 %
Fuel, ammunition & stores: 438 tons, 8.4 %
Miscellaneous weights: 60 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,670 lbs / 2,118 Kg = 70.4 x 5.1 " / 130 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.7 ft / 0.8 m
Roll period: 13.3 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.04

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.8 %
- Above water (accommodation/working, high = better): 126.5 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 79 lbs/sq ft or 386 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.35
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

Champion class

Yopal (ex-Providencia, ex-Champion) reconstructed in 1933 following engagement with Pirate ship SS Intrepida (later determined to be decoy vessel)
Maturia, damaged in 1932 by Pirate ship SS Intrepida and scuttled

As refited...

Yopal (ex-Providencia, ex-Champion), Colombian (ex-Argentinian, ex-Atlantean) Light Cruiser laid down 1915, (Engine 1933), purchased 1942

Displacement:
4,775 t light; 5,018 t standard; 5,228 t normal; 5,395 t full load

Dimensions: Length overall / water x beam x draught
485.10 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
147.86 m / 145.08 m x 15.85 m x 4.88 m

Armament:
8 - 5.10" / 130 mm guns (5 mounts), 66.33lbs / 30.09kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 1 raised mount
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, all amidships
6 - 1.57" / 39.9 mm guns (3x2 guns), 1.93lbs / 0.88kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.79" / 20.0 mm guns (3x4 guns), 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 669 lbs / 303 kg
Shells per gun, main battery: 350
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.58" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.58" / 40 mm 0.79" / 20 mm 1.17" / 30 mm
2nd: 1.00" / 25 mm - -
3rd: 0.79" / 20 mm - -
4th: 0.60" / 15 mm - -

- Armour deck: 1.17" / 30 mm, Conning tower: 1.58" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 50,000 shp / 37,300 Kw = 30.40 kts
Range 5,500nm at 10.00 kts
Bunker at max displacement = 376 tons

Complement:
306 - 399

Cost:
£0.642 million / $2.568 million

Distribution of weights at normal displacement:
Armament: 84 tons, 1.6 %
Armour: 1,030 tons, 19.7 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 41 tons, 0.8 %
- Armour Deck: 345 tons, 6.6 %
- Conning Tower: 10 tons, 0.2 %
Machinery: 1,457 tons, 27.9 %
Hull, fittings & equipment: 2,105 tons, 40.3 %
Fuel, ammunition & stores: 452 tons, 8.6 %
Miscellaneous weights: 100 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,883 lbs / 2,669 Kg = 88.7 x 5.1 " / 130 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 2.4 ft / 0.7 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.27
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.00 ft / 7.62 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.40 ft / 5.00 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106.8 %
- Above water (accommodation/working, high = better): 133.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 84 lbs/sq ft or 411 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.48
- Overall: 1.04
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

Undaunted class

CL Carabobo (Ex-Undaunted, purchased 1932)
CL Junin (Ex-Inconstant, purchased 1932)


Undaunted, Atlantis Light Cruiser laid down 1914

Displacement:
4,824 t light; 4,973 t standard; 5,228 t normal; 5,431 t full load

Dimensions: Length overall / water x beam x draught
479.53 ft / 476.00 ft x 52.00 ft x 16.00 ft (normal load)
146.16 m / 145.08 m x 15.85 m x 4.88 m

Armament:
5 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1914 Model
Breech loading guns in deck mounts
on centreline, evenly spread
1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1914 Model
Anti-aircraft gun in deck mount
on centreline
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1914 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
6 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1914 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 505 lbs / 229 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes, 2 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 390.00 ft / 118.87 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 86.00 ft / 26.21 m 8.00 ft / 2.44 m
Main Belt covers 126 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 0.78" / 20 mm, Conning tower: 6.10" / 155 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,396 shp / 35,357 Kw = 30.00 kts
Range 4,800nm at 10.00 kts
Bunker at max displacement = 458 tons

Complement:
306 - 399

Cost:
£0.608 million / $2.431 million

Distribution of weights at normal displacement:
Armament: 63 tons, 1.2 %
Armour: 928 tons, 17.8 %
- Belts: 634 tons, 12.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 25 tons, 0.5 %
- Armour Deck: 230 tons, 4.4 %
- Conning Tower: 40 tons, 0.8 %
Machinery: 1,826 tons, 34.9 %
Hull, fittings & equipment: 1,957 tons, 37.4 %
Fuel, ammunition & stores: 404 tons, 7.7 %
Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,338 lbs / 1,968 Kg = 52.2 x 5.5 " / 140 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.9 ft / 0.9 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.10
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.462
Length to Beam Ratio: 9.15 : 1
'Natural speed' for length: 21.82 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (60 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.00 ft / 4.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 128.1 %
- Above water (accommodation/working, high = better): 133.6 %
Waterplane Area: 15,947 Square feet or 1,482 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 79 lbs/sq ft or 385 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.41
- Overall: 1.04
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Almirante Brión, projected for 1943
Almirante Garcia, projected for 1943

Future project A

Future project B