Hey,
About 5 years ago my family and I were sailing from Mt. Sinai NY to Milford CT. I distance of about 18 nm (usually about 3-4 hours). About half way there I go below to make lunch for everyone. I'm down there about 10 minutes when my wife, who was on watch, calls me on deck. There is small CG boat holding station about 100 yards away. I look at the VHF, and to my embarrassment, which was on 17 (must have gotten changed accidentally). I switch to 16 and hail them. They ask a bunch of questions about who is in board, where we're going, documentation number, etc. I guess they were satisfied with the our answers because they wish us well and then leave.
About 30 minutes later I hear them hail a small powerboat. They ask similar questions, but must not have liked the answers because I hear them say 'prepare to be boarded'. I think 'oh boy, what has the power boat done?' After a few minutes I see the CG boat leave. Then the power boat gets on the VHF and hails the CG Boat. The CG says something like 'we're done captain, have a nice day' and then the powerboat tells them they left a backpack on board his boat and to please come back and get it.
I bet the CG crew wasn't too happy about that!
Barry