Yacht shadows dinghy Seaford Bay 4 8 2021

The yacht was keeping a steady distance behind a small inflatable dinghy with four people on board. I initially thought that the dinghy was towing the yacht, as the distance between them remained the same, but I can see no evidence of a tow line. In close up the occupants of the dinghy may be four young people. They do not seem to be wearing buoyancy aids, although it is hard to see. Perhaps the yacht's crew were making sure they made it back to port safely.