[3][4] In 1795, she served in the Mediterranean under Admiral François Joseph Bouvet and took part in the landing attempt in Ireland planned by General Louis Lazare Hoche.

When the fleet reached the West Indies, Villeneuve sent Commodore Cosmao-Kerjulien with the Pluton and the Berwick to attack the British position on Diamond Rock, which surrendered on 2 June.

On 22 July 1805, in the battle of Cape Finisterre the quartermasters of Indomptable spotted the British fleet under Sir Robert Calder.

At about two in the morning of 22 October, her crew heard distress calls from the French ship Bucentaure which had struck a reef off Santa Catalina fort.

The ship's boat was run out and brought alongside Bucentaure, whose crew requested an anchor and hawsers to secure their vessel.

[5]: 289, 298 On the night of 25/26 October,[1] a storm broke Indomptable's anchor chains [clarification needed] and she was carried onto rocks offshore from Cadiz.