WesWorld

A small vessel intended to protect minefields from light craft and minesweepers or, alternatively, to provide mobile fire support to army units fighting in coastal regions.

Angamos, Peruvian Coast Defense Gunboat laid down 1946

Displacement: 974 t light; 1,029 t standard; 1,220 t normal; 1,372 t full load

Dimensions: Length overall / water x beam x draught

238.21 ft / 229.66 ft x 31.17 ft x 10.50 ft (normal load) [72.61 m / 70.00 m x 9.50 m x 3.20 m]

Armament:

4 - 4.72" / 120 mm guns (2x2 guns), 52.72lbs / 23.91kg shells, 1946 Model Dual purpose guns in deck mounts with hoists on centerline ends, evenly spread
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1946 Model Anti-aircraft guns in deck mounts on side, all amidships, all raised mounts - superfiring
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1946 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 219 lbs / 99 kg
Shells per gun, main battery: 250

Armor:

Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 98.43 ft / 30.00 m 13.12 ft / 4.00 m
Ends: Unarmored
Main Belt covers 66 % of normal length

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.57" / 40 mm 2.36" / 60 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm -
3rd: 0.59" / 15 mm - -

Armor deck: 1.18" / 30 mm, Conning tower: 1.57" / 40 mm

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 5,503 shp / 4,105 Kw = 20.00 kts
Range 5,400nm at 15.00 kts
Bunker at max displacement = 342 tons

Complement: 103 - 134

Cost: £0.541 million / $2.165 million

Distribution of weights at normal displacement:

Armament: 27 tons, 2.2 %
Armor: 261 tons, 21.4 %
- Belts: 120 tons, 9.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 26 tons, 2.1 %
- Armor Deck: 111 tons, 9.1 %
- Conning Tower: 4 tons, 0.3 %
Machinery: 137 tons, 11.3 %
Hull, fittings & equipment: 528 tons, 43.3 %
Fuel, ammunition & stores: 246 tons, 20.2 %
Miscellaneous weights: 20 tons, 1.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 2,988 lbs / 1,355 Kg = 56.7 x 4.7 " / 120 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.1 ft / 0.3 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 79 %
- Recoil effect (Restricted arc if above 1.00): 0.67
Seaboat quality (Average = 1.00): 1.76

Hull form characteristics:

Hull has raised forecastle
Block coefficient: 0.568
Length to Beam Ratio: 7.37: 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.69 ft / 6.00 m
- Forecastle (30 %): 17.39 ft / 5.30 m (16.73 ft / 5.10 m aft of break)
- Mid (40 %): 16.73 ft / 5.10 m
- Quarterdeck (30 %): 10.17 ft / 3.10 m
- Stern: 10.17 ft / 3.10 m
- Average freeboard: 14.25 ft / 4.34 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 57.9 %
- Above water (accommodation/working, high = better): 134.1 %
Waterplane Area: 5,081 Square feet or 472 Square meters
Displacement factor (Displacement / loading): 157 %
Structure weight / hull surface area: 53 lbs/sq ft or 260 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 6.02
- Overall: 1.07
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weight

Navigation and surface search radar - 8 tons
Air search radar - 2 tons
Surface and air fire control radar - 8 tons
Dedicated diesel engine generator - 2 tons

Agamos? Did you mean Angamos, as in the naval battle?

Quoted from "Brockpaine"

Agamos? Did you mean Angamos, as in the naval battle?

I believe you are correct. This is what comes from note-taking late at night. Historically it was a Chilean victory, but Peru also had several warships that carried the name.

Yes - even though it was a Chilean victory the Peruvians still acquitted themselves honorably in the face of overwhelming force.

Quoted from "Brockpaine"

Yes - even though it was a Chilean victory the Peruvians still acquitted themselves honorably in the face of overwhelming force.

I do have to wonder when a military celebrates too many 'honourable defeats'. :rolleyes:

Indeed. I find it amusing that Chile celebrates their Navy Day on the anniversary of their defeat at the Battle of Iquique, while the Peruvians celebrate their Navy Day on the anniversary of their defeat at Angamos...