Possible Clues:

• Upper edge of ship's side
• Part of vessel primarily underwater? Not when in high wind
• Ship lip
• Topmost planking of a wooden vessel
• Topmost planking of a wooden vessel's hull
• Boat part
• Frantically lug a new section of boat
• Rev with beer finds an edge at sea
• Part of ship first of all in urgent need, wrecked in storm
• English law set up after weapon used in part of boat