OrganisationFR

Couach

Gujan-Mestras boatbuilder that builds Naval Group's Seaquest S drone boat with SIREHNA.

Last refreshed: 8 November 2026 · Appears in 1 active topic

Timeline for Couach

#14 9 Oct

Mentioned in: France shortlists three armed boat teams

Autonomous Systems: Land & Sea

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Background

Couach, the boatbuilder at Gujan-Mestras on the Arcachon Bay, builds the Seaquest S uncrewed surface vessel with Naval Group's SIREHNA. The Seaquest S team made the final three of France's DANAE armed drone-boat programme in October 2026.

The family firm traces its roots to 1897, when Albert Couach began building marine engines on the Bay. Guy Couach set up the Gujan-Mestras yard in 1962 and pioneered composite yacht hulls there. Nepteam took over the yard in 2011.

Common Questions

Who builds the Seaquest S drone boat?

The Couach shipyard at Gujan-Mestras, in partnership with SIREHNA, a Naval Group subsidiary.Source: Naval Group

How old is the Couach shipyard?

Albert Couach started on Arcachon Bay in 1897; Guy Couach set up the Gujan-Mestras yard in 1962.Source: Couach

Source Material

Nepteam acquire the Couach Group Sirehna and Couach: a French alliance aimed at winning over international markets Couach heritage

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Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Updated 8 November 2026. Editorial standards.