One of Bermuda’s most unique gifts to the laws of sailing is the unusual set of rules relating to the racing of Bermuda Fitted Dinghies.
Unlike any other sailing boat class, the number of crew that must finish a Bermuda Fitted Dinghy race can be less than the number that started the race, without fear of disqualification.
This unique rule encourages Fitted Dinghies to have their crew members dive off the transom during the latter stages of a race to help push the boat forward, as well as lightening the boat and increasing performance.
Once crew members have left the boat (normally on a downwind run), they may not re-board the boat during the same race, and they are generally left to their own devices.
For more background, see:
https://en.wikipedia.org/wiki/Bermuda_Fitted_Dinghy
https://www.boats.com/reviews/fourteen-feet-crew-of-six/
http://www.rhadc.bm/elizabeth-ii/
Bermuda Legal 