Safety · Destination Guide
Cold-water wrecks, jewel-anemone walls and grey seals beyond Land's End
Scilly's remoteness makes conservative judgment central to every water activity. Local medical services are concentrated on St Mary's, inter-island transfer can take time, and specialist diving treatment requires mainland coordination. Use qualified local operators, respect tide and weather decisions, carry appropriate insurance, and preserve both protected archaeology and wildlife habitat.
Dive within the group's least-experienced member's recent capability. Open-Atlantic swell, tidal streams, shot-line descents and deep wreck sections can combine on one dive.
Isles of Scilly Hospital and the principal GP and urgent-care services are on St Mary's. Visitors staying on Tresco, St Martin's, Bryher or St Agnes may need an inter-island medical transfer. No local recompression chamber was identified in the reviewed official medical sources; specialist diving emergencies are coordinated through Coastguard and the National Diving Accident Helpline, with mainland hyperbaric support such as DDRC Healthcare in Plymouth as directed. Carry adequate medical and evacuation insurance, declare relevant conditions to the operator and bring enough prescription medication for travel disruption.
Atlantic transport disruption
Fog, low cloud, wind, swell and low-water constraints can delay or cancel fixed-wing flights, helicopters, ferries and inter-island boats. Keep essential medication and a change of clothing in hand baggage.
Strong tidal streams
Wreck and reef access can depend on a narrow tidal plan. Follow the skipper's entry, shot-line, separation and delayed surface marker buoy procedures exactly.
Cold-water exposure
Summer air can feel gentle while prolonged immersion and a windy boat ride still produce rapid cooling. Use conservative exposure protection and change into dry layers immediately.
Limited definitive medical care
Core medical support is on St Mary's and specialist diving treatment requires mainland coordination. Diving and apnea profiles should preserve a wide safety margin.
The archipelago includes a Special Area of Conservation, a seabird Special Protection Area and multiple Marine Conservation Zones. Protection is behavioral, not just administrative.
Do Not Do This
Avoid entering when atlantic transport disruption. Confirm local briefings before committing.
| Contact | Role | Phone | Availability |
|---|---|---|---|
| UK Emergency Services | Police, ambulance, fire and Coastguard request | 999 or 112 | 24 hours |
| HM Coastguard | At-sea emergency coordination | VHF Channel 16 or 999 | 24 hours |
| National Diving Accident Helpline | Diving-accident medical advice and chamber coordination for England and Wales | +44 7831 151523 | 24 hours |
| NHS 111 | Urgent but non-life-threatening medical advice | 111 | 24 hours |
| Isles of Scilly Hospital | Local hospital and minor-injury support on St Mary's | +44 1720 422392 | Call for current service hours; use 999 for emergencies |
| DDRC Healthcare | Mainland diving and hyperbaric specialist in Plymouth | +44 1752 209999 | Diving emergency support available 24 hours; use Coastguard and the national helpline first for an active incident |