GPS antenna
All B900 variants have an integrated high-performance GPS receiver & antenna, and are compatible with the GPS, GLONASS, Galileo, and BeiDou satellite navigation systems. A multi GPS mode can be enabled using proAIS2, allowing you to select combinations of the above systems. This will provide a more stable position fix, and also offers redundancy if one of the satellite systems goes offline. If you install it near a window, under a fiberglass deck or inside a centre console, you will not require an external GPS antenna. If your installation location is deep inside your boat where the GPS antenna will not be able to receive satellite signals you will need an external GPS antenna. We recommend the em-trak GPS100, which is available for purchase from www.em-trak.com.
Figure 8 : GPS antenna connector
Note the following guidelines when installing an external GPS antenna.
You will require a 1" (inch) 14 Threads per inch (TPI) threaded mount if you choose to pole mount the GPS antenna.
The GPS antenna is also supplied with a gasket/thumb nuts/ studs so it can be deck mounted. The gasket can be used as a mounting template if required.
Mounting the external GPS antenna at a low point on the boat will minimise the effect of pitch and roll on your transmitted position.
Do not mount your antenna in the direct path of a radar or any other transmitting equipment.