| Sailing terms beginning with C |
| Catamaran |
| A twin hulled craft |
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| Centerboard |
| A pivoting board that prevents the boat from sliding sideways. |
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| Centerline |
| The center of the boat: from the stern to the bow. |
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| Chart |
| A nautically specialized map. |
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| Chine |
| The angle between the side and bottom of a boat. |
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| Cleat |
| A fitting for securing a line. It can be wooden, metal or nylon. |
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| Clew |
| An aft corner of a triangular sail. |
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| Close Hauled |
| Sailing as close as possible to the wind |
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| Cockpit |
| The rear boat area from where the crew operates the boat. Also refers to the area below decks. |
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| Crew |
| People who operate a boat. The crew in a two man sailing dinghy usually refers to the person operating the jib sail /spinaker. |
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| Cringle |
| Rope loop or eye formed in sail or net. |
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| Cuddy |
| Shelter on a boat not large enough to be a cabin. |