Originally posted by Jarska:

The 30-second warning is not helpful if [...].... maybe a 10-second counter could be better.

I don't get it. 10 seconds more?

Also when we are sailing the save will throw my friend out of the boat.

This is interesting. I would expect this desynchronization to occur in case of a reload (when your friend's position in the world was saved just before yours and your boat's), but not as a result of a mere save. In waiting for devs to solve this issue, a conservative behaviour would be to stand as still as possible during a save then.