French Navy on 5 November 1992, given the hull number A 601, and is based at Brest, France. In September 1999, Monge took part in tests in the Bay of Biscay. From 27 March to 1 April 2000, Monge visited Lisbon, Portugal. After the end of a refit in December 2000, Monge validated the launch of the French military satellite Hélios II in December 1999. On 17–18 April 2001, Monge took part in the test firing of an M45 missile off the coast of Brittany. In September 2002, the ship visited Toulon for the first time before travelling to Piraeus, Greece for the Armament Fair. This was the ship's first deployment to the Mediterranean Sea. The deployment ended in October, when Monge returned to the Atlantic, passing Gibraltar on 10 October. On 15 June 2004, as Monge was manoeuvring in Brest's harbour, the propellers churned up the body of a man. The man was later identified and no foul play was suspected. On 1 February 2005, the ship monitored a test firing of an M45 missile off the coast of Brittany. From 31 May to 24 June, the vessel travelled north, visiting Spitzbergen, Norway before crossing the Arctic Circle and visiting Greenland. Before returning to Brest, the ship visited Edinburgh, Scotland. On 9 November 2006, Monge monitored the first launch of an M51 ballistic missile over the Atlantic Ocean from the Landes Test Centre. Beginning in 2007, Monge began trials and testing of the Ariane rockets. On 27 November 2010, the test-fired an M51 ballistic missile from Audierne Bay. Monge monitored the launch. In September 2011, the ship monitored the re-entry of the US Upper Atmosphere Research Satellite. On 24 September, the satellite crashed into the Pacific Ocean. On 1 October 2015, Monge monitored the launch of a new version of the M51 missile. On 27 September 2018, Monge lost power while returning to Brest. The vessel was within of the Pierres Noires lighthouse when the ship conducted tests and lost power. The tugboat was dispatched to the tow the vessel the rest of the way into Brest. In April 2021 it was reported that Monge had docked at the US Navy base in Norfolk, Virginia, possibly on a mission to monitor a test of the French M51 SLBM, launched from Biscarosse in southwestern France. In June 2022 the ship paid a visit to Lisbon, Portugal, and also made its