Tachometric Scale - Girard-Perregaux LAUREATO Instrucciones De Uso

TACHOMETRIC SCALE

This function measures an average speed over a given distance.
Let us take a road with 2 markers A and B set one kilometer (or mile) apart. Start your chronograph
as your car passes marker A, then stop it as it passes marker B. Then read the average speed
in kilometers/hour or miles/hour on the tachometer scale at the tip of the chronograph center
seconds hand.
64
Start
Start
Stop
20 sec = 180 km/h
40 sec = 90 km/h ...
Stop