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Permit vs Alfa

Permit vs Alfa at a glance — displacement 3,810 vs 2,300 tons, length 84 vs 81 m, speed 15 vs 12 knots, crew 112 vs 31.

Alfa submarine side profile drawing
🇷🇺 Alfa
Specifications
Permit Alfa
Origin 🇺🇸 United States 🇷🇺 Ex-USSR
Category Submarine Submarine
Type Nuclear-powered attack submarine Nuclear-powered attack submarine
Manufacturer Portsmouth Naval Shipyard Admiralty yard, Leningrad
Year introduced 1961 1971
Number built 14 units 7 units
Estimated unit price NA NA
Displacement 3,810 tons 2,300 tons
Maximum speed 15.0 knots 12.0 knots
Range Unlimited Unlimited
Length 84.9 m 81.4 m
Beam 9.6 m 9.5 m
Crew 112 31
Max depth 400 m 400 m
Performance Radar Chart
Armament & Systems
Permit Alfa
Armament
  • 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
  • 6 x 533 mm torpedo tubes
  • 18 SET-65 or 53-65K torpedoes
  • 20 VA-111 Shkval torpedoes
  • 24 mines
Propulsion 1 S5W PWR, 2 steam turbines, 15,000 shp (11 MW), 1 shaft OK-550 or BM-40A, 155-MWt Lead-bismuth cooled, beryllium-moderated reactor; 40,000 shp (30,000 kW) steam turbine, one shaft
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Frequently Asked Questions

Which has greater displacement, the Permit-class or Alfa-class?
The Permit-class has greater displacement at 3,810 tons compared to the Alfa-class's 2,300 tons.
Which is faster, the Permit-class or Alfa-class?
The Permit-class is faster with a maximum speed of 15 knots compared to the Alfa-class's 12 knots.
Which has longer range, the Permit-class or Alfa-class?
Both the Permit-class and Alfa-class are nuclear-powered and have unlimited range, limited only by food supplies and crew endurance.
Which is longer, the Permit-class or Alfa-class?
The Permit-class is longer at 84.9 meters compared to the Alfa-class's 81.4 meters.
How many crew members do the Permit-class and Alfa-class have?
The Permit-class has a larger crew complement of 112 compared to the Alfa-class's 31 crew members.
Which can dive deeper, the Permit-class or Alfa-class?
Both the Permit-class and Alfa-class have a maximum depth of 400 meters.
Which has been built in greater numbers, the Permit-class or Alfa-class?
The Permit-class has been built in greater numbers with 14 vessels compared to 7 vessels of the Alfa-class.