A large number of commercial and private yachts are registered in Bermuda. In general the procedures for survey and certification are exactly the same as they are for ships.
Commercial Yachts of over 500 GT will normally be issued with the same SOLAS and MARPOL certification as cargo ships. Often the Safety Equipment certificate and the Loadline certificate will be claused to indicate that compliance is with the Large Yacht Code (LY2) which has been notified to the IMO by the UK as an equivalent measure.
Yachts under 500 GT will not normally have SOLAS certificates. Instead they will be issued with a Certificate of Compliance with the large yacht Code. The surveys for this can be delegated to the vessel’s Classification Society.
For ISM and ISPS audits the procedure and levels of delegation are exactly the same as for ships.