A GPS antenna is arranged such that it can easily receive satellite radio waves. An ATV is a saddle-type vehicle equipped with a navigation system for measuring the position of the vehicle by receiving radio waves from an artificial satellite. A meter box is mounted to a front portion of the vehicle, and a GPS unit is mounted in an upper portion of the meter box. A GPS antenna is mounted to the top of the GPS unit. A second GPS antenna is mounted to a rear fender to enable diversity reception.