Bunks on a ship (6)
I believe the answer is:
berths
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bunks on a ship</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for berths that I've seen before include "Beds on ships or trains" , "Spaces in port for ships and boats" , "Beds on boats" , "Docks" , "Beds on ship or train" .)