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Duke vs Sigma

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Specifications
Duke Sigma
Origin 🇬🇧 United Kingdom 🇳🇱 Netherlands
Category Frigate Frigate
Type Anti-submarine frigate Multi-purpose corvette / frigate
Manufacturer Yarrow Shipbuilders Damen Schelde Naval Shipbuilding
Year introduced 1987 2007
Number built 16 units 10 units
Estimated unit price $165 million $222 million
Displacement 4,900 tons 1,692 tons
Maximum speed 28.0 knots 28.0 knots
Range 7,500 nm at 15 knots 4,800 nm at 14 knots
Length 133.0 m 90.7 m
Beam 16.1 m 13.0 m
Crew 185 80
Performance Radar Chart
Armament & Systems
Duke Sigma
Armament
  • 1 × 32-cell Sea Ceptor GWS 35 VLS
  • 2 × quad Harpoon Block 1C (being replaced by Naval Strike Missile)
  • 2 × twin 12.75 in (324 mm) Sting Ray torpedo tubes
  • 1 × BAE 4.5 inch Mk 8 naval gun
  • 2 × 30 mm DS30M Mk2 guns or 2 × 30 mm DS30B guns
  • 2 × Browning .50 caliber heavy machine guns
  • 4 × General-purpose machine guns
  • 1 × Oto Melara 76 mm gun
  • 2 × 20 mm Denel GI-2 gun
  • 2 × quad (8) Mistral TETRAL Anti-air missile
  • 4 × Exocet MM40 Block II/MM40 Block III anti-surface missile
  • 2 × B515/3 triple launchers for lightweight WASS A244-S mod.3 / EuroTorp MU 90 torpedoes
Propulsion CODLAG: 4 × 1,510 kW (2,025 hp) Paxman Valenta 12CM diesel generators or 4 × 1,650 kW (2,210 shp) MTU 12V4000 M53 diesel generators; 2 × GEC electric motors delivering 2,980 kW (3,996 hp) each; 2 × Rolls-Royce Marine Spey SM1C delivering 19,500 kW (26,150 hp) 2 × SEMT Pielstick 20PA6B STC rated at 8910 kW each driving a lightweight Geislinger coupling; 4 × Caterpillar 3406C TA generator rated at 350 kW each; 1 × Caterpillar 3304B emergency generator rated at 105 kW; 2 × shaft with Rolls-Royce Kamewa 5 bladed controllable pitch propeller

Overview

The Duke and the Sigma are both Frigate classes.

The Duke displaces 4,900 tons — 2.9x the Sigma's 1,692 tons. The Duke reaches 28 knots vs 28 knots for the Sigma. Operational range is 7,500 nautical miles for the Duke vs 4,800 for the Sigma. The Duke carries a crew of 185 vs 80 for the Sigma.

The Duke was produced in 16 units vs 10 for the Sigma. Cost per hull is $165M for the Duke vs $222M for the Sigma. The Duke was commissioned in 1987, 20 years before the Sigma (2007).

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Frequently Asked Questions

Which has greater displacement, the Duke-class or Sigma-class?
The Duke-class has greater displacement at 4,900 tons compared to the Sigma-class's 1,692 tons.
Which is faster, the Duke-class or Sigma-class?
The Sigma-class is faster with a maximum speed of 28 knots compared to the Duke-class's 28 knots.
Which has longer range, the Duke-class or Sigma-class?
The Duke-class has a longer range at 7,500 nautical miles compared to the Sigma-class's 4,800 nautical miles.
Which is longer, the Duke-class or Sigma-class?
The Duke-class is longer at 133.0 meters compared to the Sigma-class's 90.7 meters.
How many crew members do the Duke-class and Sigma-class have?
The Duke-class has a larger crew complement of 185 compared to the Sigma-class's 80 crew members.
Which is more expensive, the Duke-class or Sigma-class?
The Sigma-class is more expensive at approximately $222 million per unit compared to the Duke-class at $165 million.
Which has been built in greater numbers, the Duke-class or Sigma-class?
The Duke-class has been built in greater numbers with 16 vessels compared to 10 vessels of the Sigma-class.