Answer: lighthouse

AnswerCrossword Clue
LIGHTHOUSEFlasher at the shore
LIGHTHOUSESailor's navigational aid
LIGHTHOUSESignaler at sea
LIGHTHOUSECape Hatteras structure.
LIGHTHOUSENavigation aid.
LIGHTHOUSEMariners' guide
LIGHTHOUSEPharos
LIGHTHOUSESeafarer's aid
LIGHTHOUSESeafarer's beacon
lighthousea structure (as a tower) with a powerful light that gives a continuous or intermittent signal to navigators
lighthouseA tower or other structure containing a beacon light to warn or guide ships at sea