A GPS signal from a GPS antenna is provided not only for a navigation apparatus through an amplifier but also for a data communication module through a TEL antenna for establishing communication with a station for data exchange, by devising high frequency switches that is controlled by an ONOFF of an antenna power supply on both of an input side and an output side of the amplifier. A signal generator generates first, second, third and fourth pulses by comparing the first and second reference signals to an input signal. The process continues by forming a layer of compressive material overlying the gate structure, and by removing a first portion of the compressive material to expose an upper surface of the temporary gate element, while leaving a second portion of the compressive material intact and external to sidewalls of the temporary gate element. The engaging member has a resilient arm and an engaging portion which is connected to the resilient arm and located corresponding to the aperture of the bracket. The rotatable stand, the fixed stand and the elastic member are positioned between the flange and the positioning groove of the rotatable shaft. The system having a first processor unit for processing and displaying information; a second processor unit for communication and for interfacing with said set of control members; and a third processor unit for interfacing with said set of sensors and said set of actuators.