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Permit vs Valiant / Churchill

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Specifications
Permit Valiant / Churchill
Origin 🇺🇸 United States 🇬🇧 United Kingdom
Category Submarine Submarine
Type Nuclear-powered attack submarine Nuclear-powered attack submarine
Manufacturer Portsmouth Naval Shipyard Vickers Armstrong
Year introduced 1961 1966
Number built 14 units 2 units
Estimated unit price NA NA
Displacement 3,810 tons 4,500 tons
Maximum speed 15.0 knots 20.0 knots
Range Unlimited Unlimited
Length 84.9 m 87.0 m
Beam 9.6 m 10.1 m
Crew 112 103
Max depth 400 m 300 m
Performance Radar Chart
Armament & Systems
Permit Valiant / Churchill
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 × 21 in (533 mm) bow torpedo tubes
  • 32 × Mark VIII and Tigerfish torpedoes
  • 64 × Mk.5 and Mk.6 mines
  • 26 × torpedoes
  • 6 × UGM-84B Harpoon Anti-ship missiles
  • Stonefish and Sea Urchin mines
Propulsion 1 S5W PWR, 2 steam turbines, 15,000 shp (11 MW), 1 shaft 1 × Rolls-Royce pressurised water reactor, 2 × steam turbines, 1 shaft

Overview

The Permit and the Valiant / Churchill are both Submarine classes.

Displacement is 3,810 tons for the Permit vs 4,500 tons for the Valiant / Churchill. The Permit reaches 15 knots vs 20 knots for the Valiant / Churchill. Operational range is 99,999 nautical miles for the Permit vs 99,999 for the Valiant / Churchill. The Permit carries a crew of 112 vs 103 for the Valiant / Churchill. Submerged displacement is 4,369 tons for the Permit vs 5,000 tons for the Valiant / Churchill. The Permit can dive to 400 m compared to 300 m for the Valiant / Churchill.

The Permit was produced in 14 units vs 2 for the Valiant / Churchill. The Permit was commissioned in 1961, 5 years before the Valiant / Churchill (1966).

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Frequently Asked Questions

Which has greater displacement, the Permit-class or Valiant / Churchill-class?
The Valiant / Churchill-class has greater displacement at 4,500 tons compared to the Permit-class's 3,810 tons.
Which is faster, the Permit-class or Valiant / Churchill-class?
The Valiant / Churchill-class is faster with a maximum speed of 20 knots compared to the Permit-class's 15 knots.
Which has longer range, the Permit-class or Valiant / Churchill-class?
Both the Permit-class and Valiant / Churchill-class are nuclear-powered and have unlimited range, limited only by food supplies and crew endurance.
Which is longer, the Permit-class or Valiant / Churchill-class?
The Valiant / Churchill-class is longer at 87.0 meters compared to the Permit-class's 84.9 meters.
How many crew members do the Permit-class and Valiant / Churchill-class have?
The Permit-class has a larger crew complement of 112 compared to the Valiant / Churchill-class's 103 crew members.
Which can dive deeper, the Permit-class or Valiant / Churchill-class?
The Permit-class can dive deeper with a maximum depth of 400 meters compared to the Valiant / Churchill-class's 300 meters.
Which has been built in greater numbers, the Permit-class or Valiant / Churchill-class?
The Permit-class has been built in greater numbers with 14 vessels compared to 2 vessels of the Valiant / Churchill-class.