Raymarine GPS navigation - Manual (Page 53)

Selection of Secondaries
When is pressed, the screen will change to the S 1,
Selection” screen. On this page the top line of large characters shows the
received secondary stations from the selected GRI.
To enter the two secondary stations for S 1 and $2 that you would prefer to
use for your calculations, Press for a NEW S 1 station
and using the numeric keys, type the number of the desired station. Then
The arrows will return. At this point you may
a new or more time to return to the Signal Status page.
For S2, press and using the numeric keys, type the number
of the desired station for S2. Then
Example: 2, for S 1 of 2
4, for S2 of 4
Press when finished to return to the
. Signal Status page.
A
3.10.2.4 GPS Signal Status I !i
When in the GPS mode and key is
pressed and is’ selected from
the Menu Directory, the GPS Status screen will
appear and show the GPS satellite signals.
I . PRESS EXIT I
The “Satellites Tracked” display shows the identification ID) of
the satellites being received, tracked, and used for L/L calculations in the
reverse block characters. The
108 sensor is usually tracking 4-6
satellites at any one time and can track up to eight, if visible. So, seeing 6 to
8 blocks illuminated is not at all unusual.
In the column below each Sat ID # you can see see the individual satellite’s
azimuth angle, it’s elevation angle the horizon, and signal level (SNR).
The data is displayed for all satellites being received.
Below the Status box the HDOP number appears and provides the current
fix quality. This rates both the strength of the satellite signals as well as the
geometry of the satellite positions. Typical HDOP numbers for a good fix
are 2 or less. Fair HDOP values are 4 or less; Poor
are over 5.
OPERATION 3-40