NorthStar 961 Reference Manual page 62

Chapter 3 - Using the Controls
Page 3-4
2. To proceed, accept the ADVISORY MESSAGE by pressing
any of the five function keys.
If chart CDs for your geographical area have been
installed onto the 961/962's hard drive, and after GPS
signals are acquired, you'll see your vessel symbol
centered on the CHART screen at your present position.
Until GPS signals are acquired, a small position-fix circle
will be located at the last known position.
If there aren't any charts covering your geographic
location installed on the hard drive, a plotter grid is
displayed instead of a chart.
Two minutes after power-up and thereafter, if GPS data is
unavailable for more than three seconds, GPS position is
considered unknown, and a non-clearable GPS alarm is activated.
You'll receive the alarm message
NO GPS FIX
or
course-over-ground (COG), lat/lon, and TDs and GRI are replaced
by dashed lines.
Turning the system off
The procedure for turning off a 961/962 with two control
heads is slightly different than for turning off a system with
one head.
Single-head system
To turn off the entire system (the control head and the
processor):
1. Press and hold the PWR key for approximately three
seconds, and the system will turn off.
Two-head system
To turn off a 961/962 with two control heads that are on:
1. Press and hold the PWR key for approximately three
seconds, and the POWER-OFF dialog box appears.
NOTE:
GPS ACQUIRING
. The displays of speed-over-ground (SOG) and
961/962 Operations and Reference Manual, Rev. A
(at power-up)