Dec 28, 2020 · humminbird not showing correct depth at high speed « on: October 28, 2011, 01:46:07 PM » So I bought the Humminbird 597ci HD DI with GPS and installed it when I put it in the water it worked great especialy the down imaging. the only problem is when I got going on plane it gave false readings saying it was 200 feet deep when I know it wasnt ... Jul 19, 2017 · Join Date Dec 1969 Location New Albany, Indiana. Posts 8,303 Post Thanks / Like Make a list of the features and settings you want to experiment with. Do some online research to find some ticks and tricks. My goal here at TopFishFinders.com is to add lots and lots of detailed fish finder set-up and usage information to the site over time. Humminbird Basemap Built-in: A clear view of underwater terrain and surrounding points of interest. Identify buoys, day markers, hazards, marinas I am pretty sure that the Helix9 that came equipped on my boat is not supposed to shut itself off when hitting minimal wake. It has, once or twice, shut...