Deck Lights Sea Terms Shapes of heavy glass let in the deck to give light to the various parts of the vessel below. Boat gear — balsa or life raft, boatswain's chair, bale, barrel and cask slings, lark's head, slippery hitch, bellows fog-horn, boat-hook heads, yacht's dingey, deck and dead lights, thole pin and rowlock ← Deck HorseAll “D” entriesDeck Pipe →