Why are the NAVTEX pages are missing on my NAV6/NAV6plus?
If your unit indicates that the antenna type is none then the LCD display has lost communication with the antenna sensor.
This will also flag the ERR tabs next to the two channel at the top of the display for 490 and 518KHz.
There can be many reasons for this, for example a poor connection or a break down in the antenna. For more assistance with this problem please contact support via the support page.