Answer: sandbar

AnswerCrossword Clue
SANDBARShoal
sandbara ridge of sand formed in a river or the sea
sandbara ridge of sand built up by currents especially in a river or in coastal waters
SANDBAROffshore ridge
SANDBARCurrent creation, sometimes
SANDBARLow tide protrusion
SANDBARBoater's obstacle
SANDBARLand line?
SANDBARMariner's worry
SANDBARShip grounder
SANDBARBoating hazard
SANDBARShoreline sight
SANDBARHazard to paddle-wheelers
SANDBARMarine hazard
SANDBARShoal.
SANDBARSailing hazard.
SANDBAROffshore island.
SANDBARMississippi obstruction.
SANDBARRidge in river.
SANDBARSailor's hazard
SANDBARNavigator's concern
SANDBARBarrier that bumps boat bottoms