When Im cruising around in the boat, my 598 doesn't want to stay at the scale I select on the chart. Some times I want to zoom in or out while cruising to see something off the screen or zoom in on some detail while under way.
However, the unit has a bad habit of switching back to its default scale all on its own. This is very frustrating at times.
Is there some setting I can change to stop this from happening?
My unit has the up-date that came out last year.
Thanks,
Larry