WesWorld

Agua Prieta (ex-USS Machias) (1890)

scrapped

***

Zaragosa (1891)

scrapped

***

Plan de Guadelupe (1892)

scrapped

***

Tampico (1902)

reclassified as Patrol Boat

***

Blanquet (1903)
Bravo

reclassified as Patrol Boat, scrapped

General Alvaro Obregon
Venustiano Carranza

Obregon class, Mexico Gunboat laid down 1930

Displacement:
1,471 t light; 1,540 t standard; 1,872 t normal; 2,138 t full load

Dimensions: Length overall / water x beam x draught
320.00 ft / 320.00 ft x 35.00 ft x 13.00 ft (normal load)
97.54 m / 97.54 m x 10.67 m x 3.96 m

Armament:
6 - 5.00" / 127 mm guns (3x2 guns), 62.50lbs / 28.35kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.10" / 27.9 mm guns (1x4 guns), 0.67lbs / 0.30kg shells, 1930 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
Weight of broadside 378 lbs / 171 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 14,084 shp / 10,507 Kw = 25.00 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 598 tons

Complement:
141 - 184

Cost:
£0.631 million / $2.524 million

Distribution of weights at normal displacement:
Armament: 47 tons, 2.5 %
Armour: 14 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 14 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 427 tons, 22.8 %
Hull, fittings & equipment: 882 tons, 47.1 %
Fuel, ammunition & stores: 401 tons, 21.4 %
Miscellaneous weights: 100 tons, 5.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,676 lbs / 1,214 Kg = 42.8 x 5.0 " / 127 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.77
Seaboat quality (Average = 1.00): 1.71

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.450
Length to Beam Ratio: 9.14 : 1
'Natural speed' for length: 17.89 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 41
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: 19.00 ft / 5.79 m
- Forecastle (15 %): 17.00 ft / 5.18 m
- Mid (40 %): 15.00 ft / 4.57 m
- Quarterdeck (11 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.67 ft / 4.78 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.5 %
- Above water (accommodation/working, high = better): 111.6 %
Waterplane Area: 7,144 Square feet or 664 Square metres
Displacement factor (Displacement / loading): 139 %
Structure weight / hull surface area: 60 lbs/sq ft or 295 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 4.21
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
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


Carries 1 seaplane

Javalina

Javalina class, Mexico Gunboat laid down 1934

Displacement:
1,754 t light; 1,898 t standard; 2,177 t normal; 2,400 t full load

Dimensions: Length overall / water x beam x draught
250.00 ft / 250.00 ft x 48.00 ft x 12.70 ft (normal load)
76.20 m / 76.20 m x 14.63 m x 3.87 m

Armament:
4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
2 - 5.00" / 127 mm guns (1x2 guns), 62.50lbs / 28.35kg shells, 1934 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
8 - 1.85" / 47.0 mm guns (4x2 guns), 3.17lbs / 1.44kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1934 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,175 lbs / 533 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 105.00 ft / 32.00 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 65 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 2,457 shp / 1,833 Kw = 15.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 502 tons

Complement:
159 - 207

Cost:
£0.955 million / $3.822 million

Distribution of weights at normal displacement:
Armament: 147 tons, 6.7 %
Armour: 622 tons, 28.6 %
- Belts: 170 tons, 7.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 145 tons, 6.7 %
- Armour Deck: 296 tons, 13.6 %
- Conning Tower: 11 tons, 0.5 %
Machinery: 71 tons, 3.2 %
Hull, fittings & equipment: 904 tons, 41.5 %
Fuel, ammunition & stores: 424 tons, 19.5 %
Miscellaneous weights: 10 tons, 0.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,204 lbs / 1,453 Kg = 12.5 x 8.0 " / 203 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 2.3 ft / 0.7 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.36
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.500
Length to Beam Ratio: 5.21 : 1
'Natural speed' for length: 15.81 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 59
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: 12.00 ft / 3.66 m
- Forecastle (20 %): 10.00 ft / 3.05 m (7.00 ft / 2.13 m aft of break)
- Mid (50 %): 7.00 ft / 2.13 m
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 7.76 ft / 2.37 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 63.9 %
- Above water (accommodation/working, high = better): 67.0 %
Waterplane Area: 7,995 Square feet or 743 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 87 lbs/sq ft or 425 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily