We always offset to show depth under the keel. For Nav purposes it is simple to add 6 feet but while sailing I don’t want to take that extra step of performing mental calculations when in skinny water. We spent 134 years sailing in a very shallow area where often the 0.5 was the number of feet under the keel. The channel entering and exiting the marina would also often read close to 0.0 so we would watch this closely to determine if we had to wait for more tide …
Mike From: CnC-List [mailto:[email protected]] On Behalf Of dwight veinot via CnC-List Sent: Monday, December 21, 2015 1:55 PM To: [email protected] Cc: dwight veinot Subject: Re: Stus-List Winter discussions - depth sounder offset Dennis maybe I don't understand what you're saying, but If you want the depth shown to closely match the depth shown on the charts should the off set not be from the transducer up to the waterline instead of down to the bottom of the keel Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS [email protected]<mailto:[email protected]> On Sun, Dec 20, 2015 at 4:03 PM, Dennis C. via CnC-List <[email protected]<mailto:[email protected]>> 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
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