Using Loran - NorthStar 941X Reference Manual

Using Loran

selecting loran
"
Page 30
MESSAGE
OLD CORRECTIONS
NOT INSTALLED
UNHEALTHY
BEACON
UNHEALTHY SATS
ACQUIRING SATS
DGPS IN USE/ OK
DGPS signal quality information for the 941X is available from the op-
tional internal beacon receiver, or from an optional external Northstar
beacon receiver. Other brands of beacon receivers may supply DGPS cor-
rections but omit the additional signal information shown on the 941X's
screen.
Press the RETURN menu key to return to the previous screen.
If you have a loran receiver connected to your 941X, you can navigate
using loran coordinates as well as GPS. Just select loran as the source of
navigation data, as described below, and you're on your way.
To display loran TD coordinates from a loran receiver interfaced to the
941X, first select loran as the navigation source, as described below.
Press the STAR key until the USER CUSTOMIZATION screen is
1.
displayed.
Press the NAVIGATION OPTIONS menu key. The NAVIGATION
2.
SOURCE line will be designated by the cursor arrow.
Press the EDIT menu key. The cursor will begin flashing.
3.
3 — Basic Navigation 3 — Basic Navigation
3 — Basic Navigation 3 — Basic Navigation
MEANING
No DGPS corrections have been received
within the DGPS DATA TIMEOUT limit set
in RECEIVER OPTIONS (default is 1 min-
ute), and the navigator has returned to non-
differential operation. See "GPS data time-
out" on page 89 for details.
A beacon receiver is not installed.
The beacon transmitter reports it has prob-
lems.
Data received from satellites cannot be re-
lied upon.
1) The GPS receiver cannot operate in
DGPS mode until it has received ephemeris
data from the satellites; or 2) the receiver
does not have a GPS fix yet.
DGPS corrections are being received and
used.
Rev. D