3707/2026
Minehunting and diving operations off Brest (Iroise), 2-13 Nov 2026
Warning text
Analysis
Activeuntil 13 Nov 2026, 23:59 UTC (in 12 days)A mine countermeasures operation will take place in the approaches to Brest and the large roadstead (Iroise) from 2 to 13 November 2026. Activities will involve sonar tug vessels, minehunters, diving support ships, underwater drones and divers. Mariners are requested not to impede sonar tugs, not to enter a 500 m radius around vessels conducting minehunting or with divers in the water, and not to deploy fishing gear in the operation area.
Do not impede the manoeuvre of sonar tugs. Do not enter a 500 m radius around vessels conducting minehunting or with divers in the water. Do not deploy fishing gear in the operation area.
- Type
- Military exercise · severity high
- Feed
- Military exercises and firingAll warnings of this kind on the map, or as an API feed.
- Location
- IROISE, AVANT GOULET DE BREST, GOULET DE BREST
- Validity
- From 02 Nov 2026, 00:00 UTC
Until 13 Nov 2026, 23:59 UTCDU LUNDI 02 AU VENDREDI 13 NOVEMBRE 2026 - Activity periods
- 02 Nov 2026, 00:00 UTC - 13 Nov 2026, 23:59 UTC (Operation period 2-13 November 2026)
- Hazards
- mine countermeasure operations, divers in the water, underwater drones, sonar towing operations
- Keep clear
- 0.27 NMNE PAS PENETRER DANS UN CERCLE DE RAYON DE 500M AUTOUR DES BATIMENTS EN OPERATION DE CHASSE AUX MINES OU AYANT DES PLONGEURS A L'EAU
Vessels involved
- Unnamed · sonar tug
- Unnamed · minehunter
- Unnamed · diving support ship
- Unnamed · submarine drone (unmanned)
Worked out automatically from the warning text on 30 Oct 2026, 09:27 UTC. It can be wrong: the official warning text is the authority.