CW32 Garmin Depth reading

[fmstuart]

Right now, I measured 6’ of depth using my boat hook (6’ from waterline to bottom of slip). The depth finder on my Garmin is 4.7’ with a zero keel offset. So, if this is the case, do I really need a keel offset?


Forrest Stuart
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[bob daily]

Mr. Forrest, your transducer is not located at the lowest (draft) of your vessel. You are in 72 inches of water, with a draft of let's say 26 inches you will have 46 inches of water under your keal not 5 ft 5 inches or almost a foot different. Your off set should be the difference from the transducer to the lowest part of the boat. Hope this helps. Bob

 

[fmstuart]

Thanks, Bob. Any clue the actual distance from the transducer to the bottom of the boat? I have outboard engines, so they are probably lower than the hull. At the factory delivery experience, we set it at 2.5 feet. I wanted to see what the reading would be with zero keel offset and in a measured six feet of water from the waterline. I was surprised, for some reason, that the reading in 6 feet of water was less than 5 feet. But, I guess it makes sense. I want to be as accurate as possible because a lot of channels in the East Cost are only 5 feet at MLLW.


Forrest Stuart
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