WesWorld

A submarine based on the Indian I-21 class. It can carry two human torpedoes and a Special Ops Team. originally the plan was to have the sub built in India but the Indians refused. So Mexico has decided to go at it alone with US and Atlantean help.

This sub has one goal: Infiltration of a Spec Ops team to blow up the Panama Canal in case of war. Of course you don't know that...

Remora, Mexico Special Ops Submarine laid down 1936

Displacement:
421 t light; 434 t standard; 525 t normal; 598 t full load

Dimensions: Length overall / water x beam x draught
190.00 ft / 190.00 ft x 20.00 ft x 12.10 ft (normal load)
57.91 m / 57.91 m x 6.10 m x 3.69 m

Armament:
1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1936 Model
Breech loading gun in deck mount
on centreline forward
1 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1936 Model
Dual purpose gun in deck mount
on centreline amidships
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1936 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 17 lbs / 8 kg
Shells per gun, main battery: 270
4 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm - -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 1,310 shp / 977 Kw = 15.90 kts
Range 7,000nm at 12.00 kts
Bunker at max displacement = 164 tons

Complement:
54 - 71

Cost:
£0.114 million / $0.456 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.4 %
Armour: 1 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 37 tons, 7.0 %
Hull, fittings & equipment: 261 tons, 49.7 %
Fuel, ammunition & stores: 105 tons, 19.9 %
Miscellaneous weights: 120 tons, 22.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
288 lbs / 131 Kg = 21.3 x 3.0 " / 76 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 0.5 ft / 0.1 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 0 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.400
Length to Beam Ratio: 9.50 : 1
'Natural speed' for length: 13.78 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (50 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.3 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,339 Square feet or 217 Square metres
Displacement factor (Displacement / loading): 249 %
Structure weight / hull surface area: 75 lbs/sq ft or 368 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.79
- Longitudinal: 1.71
- Overall: 1.93
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability

I'm pretty sure you'd need more explosive than could be possibly be delivered by a human torpedo. HMS Campbeltown used 4.5tons of explosives against the drydock in St. Nazaire.

Maybe the Mexicans will just then proceed to ram the gates with the submarine, and blow that up.

In his position, I'd have the frogmen attach limpet mines to a ship waiting to transit. After a certain time, the mines go off, and the ship sinks, hopefully while in a lock.

That is probably the best plan actually, though it would have to be at night and the fuse better be pretty long.

Quoted

This sub has one goal: Infiltration of a Spec Ops team to blow up the Panama Canal in case of war. Of course you don't know that...

Cardinal Ximénez: "The Iberian Inquisition has ears EVERYWHERE!! Ha-ha-ha!"
*Diabolical laughter*
Cardinal Ximénez: "Both IC as well as OOC! Try and beat that!"
*Diabolical acting*

Quoted

That is probably the best plan actually, though it would have to be at night and the fuse better be pretty long.

And there would be the problem. If you guess wrong, then the ship will sink before it reaches to locks or it will have passed the locks.
Suicide missions might work...

Oh this is but one of many different plans to attack the Canal. They range from 5 man teams with shaped charges to massed bomber raids.

This sub can also be used against Iberian Capital ships in Havana and elsewhere.

Depending on the situation, the amount of explosive could easily be sufficient. An ideal situation would be that the chariot drives into the lock and is parked against the upstream doors before being abandoned and detonating. The doors on the Normandie drydock at St. Nazaire were MUCH, MUCH thicker in cross-section than the Panama Canal locks, 35 feet vs only 7 feet.