On NYs day, I was returning to Richmond from Alameda. My handheld 76C was in the cockpit
keeping track when I drove into a fogbank. Shortly afterwards the batteries crapped out and the sucker went blank. I installed fresh batteries and tried to re-initialize without success. This went on for about half an hour before I determined that the unit had reverted to the last known location (Lagos, Portugal), and was searching for the GPS
constellation in the eastern Atlantic. I don't know if this problem is unique to the 76C or all Garmin
units, but if the unit thinks it's in the wrong place, it may NEVER re-initialize until you physically scroll your location from where it last THOUGHT you were, to where you actually are located.