Hi,
I'm trying to revive a used 1197. The machine doesn't recognize any GPS unit that I connect and the Navigation Menu Tab is not visible. Is the loss of Navigation Menu an expected consequence of the missing GPS? The simulation shows all views, though. I have tested with the latest firmware (6.640) and with 6.600, no difference. For some reason the unit doesn't care if a transducer is connected or not, it always starts in Normal mode. All sonar features work well, and so does recording. But without GPS positions the unit is not very usable.
Added: I think I found the answer, my old 981 drops the navigation menu when the GPS is turned off. Now I have to figure out why the unit won't recognize a GPS.
Rickard