picketboat

picketboat

(ˈpɪkɪtˌbəʊt)
n
(Nautical Terms) nautical a boat which keeps guard
References in periodicals archive ?
78) These estimates were based on information from a Japanese picketboat that the Americans had employed three carriers in their raid on Tokyo on 18 April.
Each security division consisted of flotillas of picketboats, submarine chasers, minelayers, and minesweepers.