I tried that. The prospects weren't great. The only one with merit came as a set with another one I dont want and neither had power cables. Seller wouldn't guarantee functionality. I'm not in a rush. I am going to check the consignment stores too.
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2000 Navigator 4200 Classic
(NOT a trawler)
I don't blame you. I have a Garmin 128 that I value for the same reason. I usually snap a shot of the screen after a trip to record the times and distances.
__________________ My boat is my ark. It's my mobile treehouse and my floating fishing cabin. It's my retreat and my respite. Everyday I thank God I have a boat! -Al FJB