Cavitate

cavitate, cavitation
A type of drag on a propeller caused by air bubbles forming near the tips of a propeller that is spinning too fast. This causes inefficiencies and unnecessary wear and tear on the propeller.
celestial navigation ...

Cavitate- The entry of air into the prop
Chafe - To damage a line by rubbing
Chafe - Wearing through of a line, sail, etc from rubbing ...

Cavitate- The entry of air into the prop
Chafe - wearing through of a line, sail, etc. from rubbing.
Charge Coil - Voltage generator used to power ignition modules.
(Mostly used on outboards.)
Chart - map of navigable waters.

See also: Boat, Keel, Light, Cockpit, Course