I am not sure of that. I think that the small ships register ("Sportboats") is all that is needed in EU waters, but for outside the EU (i.e in America) I think the full registry ("Seeschiffsregister") is required for a German flagged yacht. In the EU, you have to re-register with a new flag/member state and that authority informs the previous flag/member state of the registry, so cancelling the older one.TradewindSailing said:...the ship-register for larger, most commercial ships, the "Seeschiffsregister". But Germany has a second "register" for the smaller boats they call them "Sportboats", ... It is internationally accepted as proof of ownership, and national registration.