Displaying Position, Cog, And Speed; Using Gps - NorthStar 958 Operator's Manual

Chapter 5 - Determining Your Position

Displaying position, COG, and speed

Using GPS

Page 60
The 958 uses a high-performance GPS receiver as its primary
source of position data, augmented by either the WAAS
satellite system, or radiobeacon differential, or both.
Depending on the type of antenna/receiver that's connected,
the 958 can determine and display position coordinates in
several different ways:
•
as lat/lon coordinates
>
from GPS satellites alone
>
from GPS plus the radiobeacon differential system
>
from GPS plus WAAS satellites
The 958 can display position as Loran TDs if the 958 is connected to a
loran receiver. Also, it can display "Phantom Loran" coordinates; that is, if
you don't have a loran receiver, but want to see your position as loran
TDs, the 958 will convert GPS coordinates into Loran coordinates.
Position, COG, and SOG are calculated from the received
satellite data, as well as time, date, and an estimate of the 958's
accuracy. To display this position information, press the
CHART key to display the GPS POSITION screen.
NOTE:
958 Operator's Manual, Rev. A