| Answer | Crossword Clue |
|---|---|
| ALDIS | Hand signal lamp for ships. |
| binnacle | a housing for a ship's compass and a lamp |
| sos | an internationally recognized signal of distress in radio code ??????-?-?-?????? used especially by ships calling for help |
| trucks | A wooden disk at the top of a ship's mast or flagstaff, with sheaves for signal halyards |
