GPS has become an indispensable aid for airborne, land and marine navigation. Correct usage and effective maintenance of GPS equipment require a good knowledge of GPS principles, operation and equipment circuitry.The GPS trainer provides in-depth knowledge and hands-on experience to maintain and troubleshoot GPS equipment. A fault panel lets the instructor insert commonly encountered faults so that trainees can learn how to troubleshoot and repair the GPS equipment in actual situations.
The GPS Trainer equipment consists of a panel mounted IFR-approved GPS receiver, a GPS antenna, and a GPS signal simulator. A simulator for altitude input is included to provide full navigation and operational capabilities. Optional system components may be added and interfaced to the system which increase its features and capabilities. Some of these optional components include an external course deviation indicator (CDI) or horizontal situation indicator (HSI), autopilot, and external annunciators.
Typically, an altitude input, an external indicator, and external annunciators are required for IFR approach certification.Altitude is used as an aid in position determination when not enough satellites are in view.
The panel mounted GPS receiver unit contains the GPS sensor,the navigation computer, a Gas Plasma Discharge Display, and all controls required to operate the unit. It also includes the data base card which slides into the front panel.
The GPS “patch” antenna is also installed. The GPS unit has outputs to drive the left-right deviation bar of the CDI and HSI.In addition, the NAV mode of the flight control systems may be coupled to the GPS receiver.
All IFR installations require remote annunciators to be mounted in the aircraft panel in order to select and indicate the status of certain functions. En route and terminal IFR certifications require annunciators for message ( (MSG) and waypoint alert (WPT). Non-precision approach certifications also require a switch / annunciator to select and display when the approach mode is armed or active.