If I am posting this in the wrong forum please move it.
Recently my LakeMaster Smartstrike/Helix 12si gen1 combination is displaying the incorrect depth for the lake I fish the most. The lake is at normal pool but I have to set the Water Level offset at -6 feet to get the contour depth numbers to agree with the Helix depth readings. The transducer is set correctly and reading straight down. I re-check the readings each time I go out but so far it consistently requires a -6ft water level offset.
I have reset the Helix factory defaults several times with software upgrades. Most recently I added the newly available base map from Humminbird but I believe I had this issue before updating the base map. Anyone else experience this issue?