I have a few that I am still not sure about:-
24: Wandering fisherman (7) Trawler has been suggested but not sure about it
22: Piece returned (4) Part is a possibility but not sure about it.
49: Drug, boat smugglers might use (5)
50. In the waterafter a shipwreck (8). Lifeboat has been suggested but it does not seem right. debris, wreckage or flotsam seem more appropriate or even lifebuoy. I always think of a shipwreck as being an event in the past ie not relevant to a lifeboat. Any help appreciated.