Chronometer
The navigator's precise timing instrument for checking target and actual times while driving.
The chronometer is a precise timing instrument with which the navigator checks the target and actual times while driving. High-quality devices allow reading to the hundredth of a second and often feature several stop functions.
In certain scoring classes, such as the hourglass class, only mechanical chronometers without a battery are permitted. In open classes, electronic devices and trip computers are also used. A reliable chronometer is part of the basic equipment of every crew.
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Related terms
Tripmeter
A precise, retrofittable distance recorder on the co-driver's side, considerably more accurate than the built-in odometer. Also called a tripmaster in the Anglo-American world.
Time card
Control card issued by the organiser on which arrival and passage times are recorded or stamped at the controls.
Plot and bash
A British navigation style where the navigator plots the route instructions – handed out only at the start or en route – onto the map while moving, and the crew presses on.