it was a 10 day trip i got sick on day 3 or 4 - fortunately there where 2 doctors on board - you MUST have a doctors certificate to legitimise your claim- I also had a letter for the LOB organisers to verify my invoice for the trip to pro rata the cost.
One friend got injured on a trip and he had a zoom call with his local GP
Thanks for the info. I've been on a couple of liveaboard trips where this would have come in handy for me. I'm not sure that there were any doctors aboard though, so might not have mattered.