The SV-GPS-250 is a sensitive, WAAS enabled GPS receiver and antenna. The advantage of having the receiver a packaged in one unit with the antenna, is that the output is a standard NMEA serial connection. A shielded antenna cable, with its inherent attenuation of signal and greater difficulty of routing, in not required to connect to the SkyView Display.
GPS latitude/longitude data is necessary for the SkyView to locate its position to display Synthetic Vision and the Moving Map. It is also necessary during calibration of the Remote Compass/Magnetometer, in order for SkyView to determine current location and the correct magnetic inclination.
An SV-GPS-250 is not necessary for the SkyView System, since and NMEA standard GPS input can be utilized from a third party GPS receiver. A major advantage of the SV-GPS-250 is that it derives its power from a SkyView Display Backup Battery. So in the event of loss of ship's power the GPS will continue to be powered. Another advantage is the SV-GPS-250 is designed to be used with SkyView, and no setup is required.
Each SV-GPS-250 contains four leads to attach to the SkyView Main Harness, including RX, TX, 8V, and Ground.