Web alarm clock for 9:08 p.m.
You finish what you are doing, gather your things, and leave at 9:08 pm to meet the medical boat at the island clinic. Setting the alarm for that exact time keeps the departure from slipping while you secure the room and check that everything you need is ready. With 10:00 pm still ahead, you can move to the landing without treating the evening as a rush.
The trip from the clinic to the landing may be quiet, so choose an alarm tone that suits where you will be when it sounds. A softer tone can work while you are indoors, but a persistent one is easier to notice over conversation, rain, or an idling banca engine. Test the volume before relying on it. Keep this browser alarm active and the phone awake; otherwise, the medical boat could arrive while no sound is produced.
Once you have left the island clinic, keep part of the evening free after the pickup rather than filling every minute before 10:00 pm. That buffer can absorb a delayed docking, a careful walk on a dim path, or time spent securing supplies after the boat arrives. Put a torch and rain cover where you can reach them, and note your next same-day commitment separately so the handover does not make it easy to overlook.