Foxtrot vs Permit
Foxtrot vs Permit at a glance — displacement 1,983 vs 3,810 tons, length 89 vs 84 m, speed 16 vs 15 knots, crew 78 vs 112.
Specifications
|
Foxtrot |
Permit |
| Origin |
🇷🇺 Ex-USSR |
🇺🇸 United States |
| Category |
Submarine |
Submarine |
| Type |
Diesel-electric submarine |
Nuclear-powered attack submarine |
| Manufacturer |
Sudomekh |
Portsmouth Naval Shipyard |
| Year introduced |
1958 |
1961 |
| Number built |
75 units |
14 units |
| Estimated unit price |
NA |
NA |
| Displacement |
1,983 tons |
3,810 tons |
| Maximum speed |
16.0 knots |
15.0 knots |
| Range |
20,000 nm at 8 knots |
Unlimited |
| Length |
89.9 m |
84.9 m |
| Beam |
7.4 m |
9.6 m |
| Crew |
78 |
112 |
| Max depth |
296 m |
400 m |
Armament & Systems
|
Foxtrot |
Permit |
| Armament |
- 10 x torpedo tubes (6 bow, 4 stern)
- 22 torpedoes
|
- 4 × 21 inch (533 mm) torpedo tubes amidships
- 12-18 × Mark 37 torpedoes (later Mark 48s)
- 4-6 × UUM-44 SUBROC anti-submarine missiles
- 4 × UGM-84 Harpoon anti-ship missiles
|
| Propulsion |
3 × Kolomna 2D42M 2,000 hp (1,500 kW) diesel engines; 3 × Electric motors (two 1,350 hp and one 2,700 hp); 1 × 180 hp auxiliary motor; 3 shafts |
1 S5W PWR, 2 steam turbines, 15,000 shp (11 MW), 1 shaft |
Detailed Comparison
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Which has greater displacement, the Foxtrot-class or Permit-class?
The Permit-class has greater displacement at 3,810 tons compared to the Foxtrot-class's 1,983 tons.
Which is faster, the Foxtrot-class or Permit-class?
The Foxtrot-class is faster with a maximum speed of 16 knots compared to the Permit-class's 15 knots.
Which has longer range, the Foxtrot-class or Permit-class?
The Permit-class is nuclear-powered with unlimited range, while the Foxtrot-class has a range of 20,000 nautical miles.
Which is longer, the Foxtrot-class or Permit-class?
The Foxtrot-class is longer at 89.9 meters compared to the Permit-class's 84.9 meters.
How many crew members do the Foxtrot-class and Permit-class have?
The Permit-class has a larger crew complement of 112 compared to the Foxtrot-class's 78 crew members.
Which can dive deeper, the Foxtrot-class or Permit-class?
The Permit-class can dive deeper with a maximum depth of 400 meters compared to the Foxtrot-class's 296 meters.
Which has been built in greater numbers, the Foxtrot-class or Permit-class?
The Foxtrot-class has been built in greater numbers with 75 vessels compared to 14 vessels of the Permit-class.
