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FDI vs Sigma

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Specifications
FDI Sigma
Origin 🇫🇷 France 🇳🇱 Netherlands
Category Frigate Frigate
Type General-purpose frigate Multi-purpose corvette / frigate
Manufacturer Naval Group Damen Schelde Naval Shipbuilding
Year introduced 2025 2007
Number built 2 units 10 units
Estimated unit price $820 million $222 million
Displacement 4,460 tons 1,692 tons
Maximum speed 27.0 knots 28.0 knots
Range 5,000 nm at 15 knots 4,800 nm at 14 knots
Length 122.0 m 90.7 m
Beam 17.7 m 13.0 m
Crew 125 80
Performance Radar Chart
Armament & Systems
FDI Sigma
Armament
  • 1 × Oto Melara 76 mm Super Rapid gun
  • 2 × Nexter Narwhal 20B 20 mm RWS
  • 8 × Exocet MM-40 Block 3c anti-ship missiles
  • 2 × Sylver A50 8-cell VLS for 16 Aster 15 or 30 surface-to-air missiles
  • 2 × 2 Sadral Mistral Simbad-RC point-defence SAM
  • 2 × twin torpedo tubes for MU90 Impact torpedoes
  • 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 Combined diesel and diesel (CODAD) arrangement with a total output of 32,000 kW (43,000 shp) 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 FDI and the Sigma are both Frigate classes.

The FDI displaces 4,460 tons — 2.6x the Sigma's 1,692 tons. The FDI reaches 27 knots vs 28 knots for the Sigma. Operational range is 5,000 nautical miles for the FDI vs 4,800 for the Sigma. The FDI carries a crew of 125 vs 80 for the Sigma.

The FDI was produced in 2 units vs 10 for the Sigma. Cost per hull is $820M for the FDI vs $222M for the Sigma. The FDI was commissioned in 2025, 18 years after the Sigma (2007).

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Frequently Asked Questions

Which has greater displacement, the FDI-class or Sigma-class?
The FDI-class has greater displacement at 4,460 tons compared to the Sigma-class's 1,692 tons.
Which is faster, the FDI-class or Sigma-class?
The Sigma-class is faster with a maximum speed of 28 knots compared to the FDI-class's 27 knots.
Which has longer range, the FDI-class or Sigma-class?
The FDI-class has a longer range at 5,000 nautical miles compared to the Sigma-class's 4,800 nautical miles.
Which is longer, the FDI-class or Sigma-class?
The FDI-class is longer at 122.0 meters compared to the Sigma-class's 90.7 meters.
How many crew members do the FDI-class and Sigma-class have?
The FDI-class has a larger crew complement of 125 compared to the Sigma-class's 80 crew members.
Which is more expensive, the FDI-class or Sigma-class?
The FDI-class is more expensive at approximately $820 million per unit compared to the Sigma-class at $222 million.
Which has been built in greater numbers, the FDI-class or Sigma-class?
The Sigma-class has been built in greater numbers with 10 vessels compared to 2 vessels of the FDI-class.