NorthStar 958 Manual Do Utilizador
Page 66
958 Operator’s Manual, Rev. A
Chapter 5 - Determining Your Position
Using loran
This section explains how you can use the 958 to navigate
using displayed loran coordinates if the 958 is connected to an
loran receiver (such as the Northstar 800). If you don’t plan to
use loran, you can skip this section.
using displayed loran coordinates if the 958 is connected to an
loran receiver (such as the Northstar 800). If you don’t plan to
use loran, you can skip this section.
Selecting and
displaying loran
To display loran time differences (TDs) from a connected loran
receiver:
receiver:
1. Press the STAR key to display the OPTIONS/SERVICE
INFO screen.
2. Press the NAVIGATION OPTIONS menu key, then select
the NAVIGATION SOURCE field.
3. Press the EDIT menu key, then press the CURSOR PAD to
display EXTERNAL LRN as the position source.
4. Press the ENTER key, then press the RETURN menu key.
5. Press the CHART key to display the GPS POSITION screen.
6. Press the CHECK LORAN key to display the LORAN POSI-
5. Press the CHART key to display the GPS POSITION screen.
6. Press the CHECK LORAN key to display the LORAN POSI-
TION screen.
TOO FEW CORRECTIONS
DGPS is off because not enough satellites with corrections are
available.
available.
POOR BCN DOP
DGPS is off because the satellites with corrections have poor
geometry (DOP is an acronym for Dilution Of Precision).
geometry (DOP is an acronym for Dilution Of Precision).
OLD CORRECTIONS
DGPS is on, but the current corrections are older than the timeout
you’ve set in the receiver options (see ”Choosing a DGPS correc-
tions time-out” starting on page 176).
you’ve set in the receiver options (see ”Choosing a DGPS correc-
tions time-out” starting on page 176).
DGPS IN USE/OK
DGPS is on and the corrections are current.
UNKNOWN
An unknown status code has been received from the GPS receiver.
Table 4: DGPS status messages (continued)
DGPS message
Meaning