At sea, we encourage all divers with problems to report to their skipper who use Channel 16 Coastguard who then trigger the appropriate action required via the Balfour Hospital switchboard. We have found this the most effective way of getting the right resources in the right place for each incident. An alternative in Scotland for Out of Hours contact is NHS 24 on 0845 4242424 although in general this is a slower and perhaps less reliable emergency contact.