GPS Antenna
The GPS antenna is used to receive input information from the satellites in orbit. The antenna receives time messages along with latitude and longitude information. This information is used by the navigation computer to calculate the exact position of the vehicle.
The antenna is an input to the GPS receiver module on Mk-I and Mk-II systems and a direct input to the navigation computer on Mk-III systems.
The antenna design differs slightly between systems. The location of the antenna also differs between vehicles as well.