Related Clues:

• Canoe propeller
• One of 170 on a trireme
• Dory driver
• Gob's paddle
• Crew implement
• One making waves
• Right triangle figure
• Mathematical ratio
• __ qua non
• Crew member?
• Kayaker's need
• Dory mover
• --- "qua non"
• Boat paddle
• Parter of the waters