I do the same, though I measured differently. Our moorings are fairly shallow (about 6 ft.). I measured actual water depth at the place where the transducer is (using a long stick) and compared it to the reading on the depth sounder. As others mentioned, I prefer to see the actual depth, not how much is left under the keel.
Marek From: CnC-List [mailto:[email protected]] On Behalf Of Dennis C. via CnC-List Sent: Sunday, December 20, 2015 16:26 To: CnClist <[email protected]> Cc: Dennis C. <[email protected]> Subject: Re: Stus-List Winter discussions - depth sounder offset Actually, you're right, mine is measured from waterline to tranducer location. Duh! Dennis C. On Sun, Dec 20, 2015 at 2:16 PM, Neil Gallagher via CnC-List <[email protected] <mailto:[email protected]> > wrote: I use the same, depth sounder shows water depth to compare to charts. If I recall correctly, in my Raymarine setup I adjusted for the depth of the transducer below the waterline, and since I have clear hoses on my cockpit drains I was able to get a decent estimate of transducer's depth. Neil Gallagher Weatherly 35-1 Glen Cove, NY On 12/20/2015 3:03 PM, Dennis C. via CnC-List wrote: Just curious what listers use for a draft offset and why. I use the actual offset as measured from the transducer to the bottom of the keel so the depth shown closely matches the charted depth. I prefer to compare the depth shown on my instruments to the chart plotter rather than have to do the math all the time. I know some owners use an offset so that the instrument shows depth under keel while others don't use any offset at all. Dennis C. Touche' 35-1 #83 Mandeville, LA _______________________________________________ Email address: [email protected] <mailto:[email protected]> To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ Email address: [email protected] <mailto:[email protected]> To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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