Foxtrot vs Permit
The Foxtrot and the Permit are both Submarine classes. Displacement is 1,983 tons for the Foxtrot vs 3,810 tons for the Permit. The Foxtrot reaches 16 knots vs 15 knots for the Permit. Operational range is 20,000 nautical miles for the Foxtrot vs 99,999 for the Permit. The Foxtrot carries a crew of 78 vs 112 for the Permit. Submerged displacement is 2,515 tons for the Foxtrot vs 4,369 tons for the Permit. The Permit can dive to 400 m compared to 296 m for the Foxtrot. The Foxtrot was produced in 75 units vs 14 for the Permit. The Foxtrot was commissioned in 1958, 3 years before the Permit (1961).
| Ex-USSR submarine, 1958 introduction year, propelled by three diesel engines and three electric motors. | |
| Origin | 🇨🇳 Ex-USSR |
| Category | Submarine |
| Type | Diesel-electric patrol submarines |
| Manufacturer | Sudomekh |
| Year introduced | 1958 |
| Number built | 75 units |
| Estimated unit price | NA |
| United States nuclear submarine, introduced in 1961, displaced 3,810 tons. | |
| Origin | 🇺🇸 United States |
| Category | Submarine |
| Type | Nuclear submarine |
| Manufacturer | Portsmouth Naval Shipyard |
| Year introduced | 1961 |
| Number built | 14 units |
| Estimated unit price | NA |
| Displacement | 1,983 tons â—‰ |
| Maximum speed | 16.0 knots â—‰ |
| Range | 20,000 nm at 8 knots â—‰ |
| Length | 89.9 m â—‰ |
| Beam | 7.4 m â—‰ |
| Crew | 78 â—‰ |
| Max depth | 296 m â—‰ |
| 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 |
| Armament |
|
| Displacement | 3,810 tons â—‰ |
| Maximum speed | 15.0 knots â—‰ |
| Range | Unlimited â—‰ |
| Length | 84.9 m â—‰ |
| Beam | 9.6 m â—‰ |
| Crew | 112 â—‰ |
| Max depth | 400 m â—‰ |
| Propulsion | 1 S5W PWR, 2 steam turbines, 15,000 shp (11 MW), 1 shaft |
| Armament |
|
Performance Radar Chart
Frequently Asked Questions
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.