| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation apparatus dispensing in a circuit field with mounting/dismounting of a stopwatch for measuring a lap time of a vehicle on a circulating course in the circuit field. SOLUTION: When a vehicle approaches the circuit field within a prescribed length, a display screen displayed on a display monitor 16 is switched from a map screen to a circuit screen 30A. A measured lap time is displayed on the circuit screen 30A. A time measuring part measures a time when the vehicle passes a magnetic bar buried in the circuit field, and measures a lap time during running in the circuit field. A magnetic sensor detects the magnetic bar buried in the circuit field. COPYRIGHT: (C)2010,JPO&INPIT |
