Dive training drills and seagrass survey training operations will be carried out by 'RV Gwenhidw' in the Dale area from 8th May 2026 to 10th May 2026.
- MARINERS ARE HEREBY ADVISED that from 8th to 10th May 2026, dive training drills and seagrass survey training operations will take place in the Dale area (see below chartlet with marked operational area).

2. The operations will be carried out by 'RV Gwenhidw' and will include diver rescue drills and seagrass survey training activities in depths ranging from 3 to 10 metres.
3. 'RV Gwenhidw' will exhibit shapes and lights as prescribed by the International Regulations for the Prevention of Collisions at Sea, maintain a listening watch on VHF Channel 12 and display Flag 'ALPHA' whenever divers are in the water.
4. Mariners are requested to pass at slow speed, make minimum wash and navigate with caution when operating in the vicinity of the dive operations.
5. Admiralty Charts 3274, 3275, Imray Y26 and 2600 Atlas refer.
6. This Notice to Mariners will self-cancel at 23:59 on 10th May 2026.
BY ORDER
M RYAN
HARBOURMASTER
Port of Milford Haven
Gorsewood Drive
Hakin
Milford Haven
Pembrokeshire
SA73 3EP
Tel: 01646 696100
Email: enquiries@mhpa.co.uk