====== On-board clock ====== {{wst>image_cl|Chronoswiss|Wristmaster|Chronoswiss Wristmaster, wristwatch in the style of an\\ **on-board clock**}} An **On-board clock** (or **Cockpit clock**) is a clock which is used on board of a vehicle (as eg. car, ship, airplane, spaceship). A special example are the [[marine chronometer]]s used as very accurate timepieces on ships. Also see [[Aviation clock]]. {{tag>Terms}}