[C320-list] Depth Transducer Offset

[Scott Thompson]

Not if the offset is negative. With the Raymarine instruments you use a 
positive offset (equal to depth of the transducer) if you want to read 
actual water depth and negative offset (equal to distance from keel to 
transducer) if you want the instrument to read how much water is below 
the keel. Basically the offset is how much you want the display to add 
to the transducer's raw data reading. I checked this on my boat last 
weekend and found I have the offset set at +1.5 feet. With that setting 
I get very nervous if the display gets to 5.0, but I have seen it go a 
bit lower without grounding. I have the deeper wing keel.

Obviously lower settings (less positive or more negative) are more 
conservative in that they will cause the instrument to report less water 
than is actually there.

--Scott

On 6/2/2016 4:54 PM, Jeff Hare wrote:
> So, is this offset the difference between the bottom of the hull where the transducer is and the float 'scum' line on the boat?
>
> -Jeff
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of stepkap
> Sent: Thursday, June 2, 2016 4:39 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Depth Transducer Offset
>
> Hull 980 was set by the yard to -2.5 ft.
> Steve
> Saline
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Daryl Hunt
> Sent: Thursday, June 2, 2016 9:57 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Depth Transducer Offset
>
>
>      
> My offset is set to read depth below the keel, so it is specific to the hull #/year.
> Fair Winds, DarylDaryl HuntC320 #660 BelievePultneyville, NY - Lake Ontario
>
> -------- Original message --------
> From: Chris Burti <clburti at gmail.com>
> Date: 06/02/2016  12:08 PM  (GMT-05:00)
> To: 320 <C320-List at catalina320.com>
> Subject: [C320-list] Depth Transducer Offset
>
> Did anybody happen to record and save the depth transducer offset number for their C-320? All the hulls are the same, so it doesn't matter what year/hull #.
> Thanks,
> Chris Burti
> Commitment, #867
> Farmville, NC
>