NorthStar 958, Operator'S Manual

Page: 76 / 232

Page 68 958 Operator’s Manual, Rev. A
Chapter 5 - Determining Your Position
longitude position fixes, the GRI must correctly match the GRI
being used by your loran receiver.
Viewing loran
warnings
Three possible loran warning indicators obtained from any
Northstar 800 series loran receiver are displayed to the right of
each TD. (These indicators are available only from Northstar
800 series lorans.)
The
L/L
indicator to the left of a TD designates it as one of the
two TDs that the loran receiver has chosen to use to calculate
latitude and longitude.
The
F/L
indicator to the left of a TD indicates that it has been
forced to be used to calculate latitude and longitude.
Returning to GPS
navigation
To return to using GPS signals for navigation, repeat the steps
shown for selecting loran in “Selecting and displaying loran”
on page 66, but specify GPS instead of loran.
Using Phantom Loran
If you have lists of fishing spots and other waypoints that you
recorded as loran time differences (TDs), the 958 can
automatically convert its GPS coordinates into TDs—in real
time, as you travel—letting you display your current position as
Table 5: Northstar 800 loran warning indicators
Indicator Meaning
SNR
Signal-to-Noise Ratio is low—use caution
BLNK
Coast Guard is transmitting a blink signal, indicat-
ing a probable transmitter problem
CYC
The receiver has detected a possible cycle slip
LOCK
The loran has locked onto the loran track point (this
isn’t a warning indicator, but an indication of normal
performance)