French Navy Monge (A601) Tracking Ship


Monge (A601) is a unique missile range instrumentation ship of the French Navy. The vessel has a standard displacement of 17,760 long tons (18,040 t) and 21,040 long tons (21,380 t) at full load. The ship measures 225.6 metres (740 ft 2 in) long overall with a beam of 24.8 metres (81 ft 4 in) and a draught of 7.7 metres (25 ft 3 in). Monge is powered by two SEMT Pielstick 8PC 2.5 L400 diesel engines driving one shaft turning a controllable-pitch propeller, rated at 7,800 kW (10,400 hp). The vessel is also equipped with one 1,360 kW (1,820 hp) bow thruster. The ship has a maximum speed of 16 knots (30 km/h; 18 mph) and a range of 15,000 nautical miles (28,000 km; 17,000 mi) at 15 knots (28 km/h; 17 mph).
French Navy Monge (A601) Tracking Ship
French Navy Monge (A601) Tracking Ship

The missile range instrumentation ship mounts two 20 mm modèle F2 guns and two 12.7 mm (0.50 in) machine guns. Monge has a 650 m2 (7,000 sq ft) landing platform and a 180 m2 (1,900 sq ft) hangar. The ship can operate heavy helicopters. Monge is equipped with one Aérospatiale Alouette III helicopter. The vessel has a complement of 115 naval personnel plus 90 military and civilian technicians. The systems in Monge allow the vessel to track missiles and satellites. There are two navigational radars operating on the I-band, one for control of the helicopters, and a Thomsen DRBV 15C air surveillance radar operating on the E and F-bands installed. The intelligence systems are a Stratus radar operating on the L-band for trajectory tracking, a Gascogne, two Armor, and one Savoie radars for missile tracking operating on the C-band.
French Navy Monge (A601) Tracking Ship
French Navy Monge (A601) Tracking Ship

Monge named after the 18th century mathematician Gaspard Monge, is a unique missile range instrumentation ship of the French Navy dedicated to tracking and measuring rocket trajectories. She was built for the trials of the submarine-launched ballistic missiles of the French Navy, and is also used to monitor the launch of Ariane rockets. The ship was built by Chantiers de l’Atlantique, Saint-Nazaire and was launched on 6 October 1990. The vessel entered service on 5 November 1992 and is based at Brest, France. The ship was ordered on 25 November 1988 as a replacement for the aging Henri Poincaré. The ship’s keel was laid down on 26 March 1990 with the yard number H39 by Chantiers de l’Atlantique at their yard in Saint-Nazaire, France. Monge, named for the 18th century mathematician Gaspard Monge, was launched on 6 October 1990. Monge entered service with the French Navy on 5 November 1992, given the hull number A 601, and is based at Brest, France.
French Navy Monge (A601) Tracking Ship
French Navy Monge (A601) Tracking Ship

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