Bavaria 31 "Colinsbav" blown a piston ring

Well following purchase I had to relocate from the Marina Funtana to the Marina Umag. 4~5 hours of motoring due to faint winds. Got to Umag and realised there was a pool of oil in the engine bay bilge. I suspected a leak out of the throttle spindel as I could see oil spillage around that area, asked the Marina to check .... look what the found. During the Survey we ran the engine at 80% for 20 minutes, not a drop so I am guessing the ring disintergrated during the move.