It a Standard Horizon unit? If so maybe an e-mail to them with a picture. Is it a fish/depth finder or gps??
Sumner
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1300 miles to The Bahamas and Back in the Mac...
Endeavour 37 Mods...
MacGregor 26-S Mods...
Mac Trips to Utah, Idaho, Wyoming, Canada, Florida, Bahamas
Thanks Joe, much appreciated !That looks like the "100" series instruments made by Standard Horizon... very similar to the 150 series... but look on the back panel . Anyway, you can download manuals from Standard Horizon site. here's the manual for the "SL 100" west marine version. It's not a multi... but appears similar in every other way. You should be able to calibrate using the SL100 info.
The MD 150 seems to provide same function as yours and also closely resembles it... so it may help a bit.
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