North Star GPS/WASS CHART NAGIVATOR GM9571M 用户手册
SECTION FIVE: Checking out the system
Page 34
957 INSTALLATION MANUAL, Revision C1
•
if a cartridge is inside, the cartridge name and date are
shown on the left of the CHART SETUP/STATUS screen
(screen at left, below).
shown on the left of the CHART SETUP/STATUS screen
(screen at left, below).
•
if a cartridge isn’t installed or is installed incorrectly, the
words NONE INSERTED are shown (screen at right, below).
words NONE INSERTED are shown (screen at right, below).
The cartridge name comes from its Navionics catalog number.
Not all cartridges will have a date, especially older ones; in this
case, only the word PRESENT is shown rather than the name
and date.
Not all cartridges will have a date, especially older ones; in this
case, only the word PRESENT is shown rather than the name
and date.
Checking satellite status
The 957 uses a high-performance GPS receiver as its primary
source of position data, augmented by either the WAAS
satellite system, or the radiobeacon differential (DGPS) system
if the 957 is connected to the optional Northstar 2701 receiver.
source of position data, augmented by either the WAAS
satellite system, or the radiobeacon differential (DGPS) system
if the 957 is connected to the optional Northstar 2701 receiver.
To see if the 957 is using WAAS or DGPS, press the CHART key
to display the GPS POSITION screen and look for the WAAS or
DGPS indicator below and to the right of the lat/lon display.
to display the GPS POSITION screen and look for the WAAS or
DGPS indicator below and to the right of the lat/lon display.
.
NONE
INSERTED