Raymarine GPS Plotter - Manual (Page 87)

4-10 Raynav 300 GPS Plotter
Default Waypoint Symbol
This setting provides a selection of symbols for the default waypoint
display.
Vectors
Heading, Tide and Course Over Ground vectors can be displayed as a line
from your vessel. The length of the vector is determined by your choice of
SOG and the time period. An infinite vector extends to the edge of the
screen.
• Heading Vector indicates your current heading.
• COG Vector indicates your course over ground.
• Tide Vector indicates the tide set. Tide information is calculated from
the speed through water, compass heading plus COG and SOG.
Datum Selection
You can select either WGS 84 or LOCAL datum. In LOCAL mode, you are
presented with a Datum Names list. Use the trackpad up/down to scroll
through the list; press ENTER to select the option and close the menu.
Note: When the datum (reference grid) is changed, the geographical
position of waypoints remains constant. However, the latitude/longitude
values change as a result of their having been calculated from a different
datum. When adding waypoints numerically to the waypoint list, or via
SeaTalk, NMEA, it is important that they are referenced to the same da-
tum in which the display is to be operated.
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:
81171_4.BOOK Page 10 Thursday, November 29, 2001 11:34 AM