User's Manual Part 1

10
Minimising the number of NAVTEX messages displayed
After the NAV-7 has been switched on for a while there will be a large number of
NAVTEX messages stored in memory. These can be quite overwhelming if the user
is looking for particular message categories or an individual message.
Several design features have been incorporated into the NAV-7 to make day to day
operation easier:
• Separate frequency channel pages
• Station filtering
• Message category filtering
• Time-limited display of messages
Separate frequency channel pages
A separate NAVTEX message display is provided for each of the 3 receiver
channels. All 518 kHz messages appear together, all 490 kHz messages appear
together and all 4209.5 kHz messages appear together. Switch between these
displays by using the View softkey.
Station filtering
NAVTEX transmitting stations that are not required can be de-selected by making
the appropriate selections in the Setup Screens.
Message category filtering
NAVTEX message categories that are not required can be de-selected by making
the appropriate selections in the Setup Screens.
Time-limited display of messages
In order to access recent messages quickly the Show softkey can be used to show
only NAVTEX messages that have been received in the selected time period (last 1
hour, 4 hours etc)