Raymarine 300 manual GPS Set Up, Fix Mode, Gps Status, D-Fix

4-12 Raynav 300 GPS Plotter

4.5 GPS Set Up

The GPS set up page provides information for the status of the tracked navigation satellites plus HDOP and satellite Fix Status. It also provides the ability to set up a Coastal GPS by manually retuning it to a different differential beacon.

➤To select GPS Set Up:

1.Press the GPS SET UP soft key to display the GPS Navigation Status screen with associated soft keys as shown in Figure 4-2:

GPS STATUS

SAT SIGNAL STATUS SAT SIGNAL STATUS

15 LOCKED 23 LOCKED

09 IN USE 18 IN USE

08 IN USE 26 IN USE

10 LOCKED 12 LOCKED

20 LOCKED 14 LOCKED

17 LOCKED 03 LOCKED

HDOP FIX STATUS

1.0D-FIX

FIX	MODE		D-GPS	RESTART
GPS	D	SD	SET UP	GPS

D5551_1

Figure 4-2: GPS Status Screen

The GPS Navigation Status screen provides, for each tracked satellite, the satellite number, a graphical signal strength bar and its current usage status. Data for up to 12 satellites are shown.

Positional accuracy is dependent upon certain parameters; in particular for GPS, the azimuth and elevation angles are used in a triangulation process to calculate position. HDOP (Horizontal Dilution Of Position) is a measure of this accuracy; a higher figure signifies greater error. In ideal circumstances, the figure should be in the region of 1.0. The Fix Status can indicate:

•FIX, where a satellite fix has been acquired.

•D-FIX, where a differential beacon fix has been acquired.

•SD-FIX, where a satellite differential fix has been acquired.

•NO FIX, where no fix can be acquired.

Fix Mode

Fix Mode provides selection of the method used to acquire a position fix.