NorthStar 972 用户手册

Quickstart Guide Revision B

To turn the 972 on, gently and briefly press 
the 

 key. (See Figure 1 on page 10 for a 

picture of the controls.)

During the startup sequence, the 972 
beeps and displays its start-up screen, and 
then performs a series of self-tests to check 
its critical components and functions. Any 
startup issues are indicated by a double 
asterisk on the screen.

Next, a message warns against relying on 
the 972 chart cartography as the only 
means of safe navigation. Acknowledge the 

warning message by pressing the 

 

key. 

Now you’re ready to get underway with 
your 972! 

To turn the 972 off, press and hold the 

 key until the screen goes dark. Allow 

up to 30 seconds for the black box to 
power down.

To adjust the screen’s brightness press the 

 or 

 key. 

If the 972 becomes too hot due to high 
ambient temperature and strong sunlight, 
the display screen may automatically dim 
to prevent overheating. You can tempo-
rarily override the auto-dim function at 
any time just by increasing the brightness. 

The 972 may dim again to avoid exceeding 
the maximum internal temperature. 

Occasionally, the 972 needs to tell you 
something or ask permission to do some-
thing. When this happens, an information 
or question window appears on the screen. 
This window may contain an alarm icon, or