Timing Algorithm

Timing Algorithm Timing calculation is carried out when the ignition is on. The 'distance covered' is that given by the vehicle speed signal only. The "time to" shown on the timing screen is updated every 30 seconds +/- 5 seconds. Timing calculations, for both waypoint and route, commences as soon as the "distance covered" is greater than 328 feet. All times used in the calculations are to the nearest second and all distances covered are to the nearest 33 feet. The "time to" for the next waypoint in the route shown on the timing screen is recalculated as the current waypoint is achieved. For timing calculations the "average speed" remains valid from the current waypoint to the next waypoint in the route and the "distance to waypoint" is reset to that distance to the next waypoint in the route. If the average speed is below 1 foot per second, then the time to the waypoint and time to complete route is not calculated and the previous data remains displayed on the timing screen. If the average speed is below 1 foot per second for more than 2 minutes, then the average speed calculations are reset but the previous data remains displayed on the timing screen. Therefore when the vehicle's speed is again above 1 foot per second the average speed calculations begin again as if guidance had just been selected. When the timing calculations are reset all existing data is lost and calculations begin again as if guidance had just been selected.