Transducer offset

Status
Not open for further replies.
Alvorada

Alvorada

.
Apr 25, 2010
35
Beneteau 331 Herrington Harbor South (Friendship, MD)
Hoping someone could help...we had to reset our Tridata and that included the depth sounder. We have a 331 with the transducers located in the same factory location, just under the V-berth and just behind the fresh water holding tank location. We searched and searched but could not find what the offset would be for the transducer to the waterline. In other words, we are looking for the actual depth from the waterline to the transducer in order to re-calibrate the fathometer. Anyone with a 331 who knows this measurement that would be wonderful. Or, if you have an idea on how I could figure it out with the boat in the water and without going over the side, that would be just as great. Thanks.

Francisco
 
Pat Campbell

Pat Campbell

.
Jun 6, 2004
8
-Beneteau -331 Rock Hall, MD
The offset on my 331, to show depth of water to the waterline, is 1.5ft. I used a small line with an old prop zinc attached as a weight. Drop it in the water next to the boat across from the location of the transducer (the depth at my slip is 7ft). Measure the length of the wet portion of the line to get the actual water depth. Put an offset in until the display matches the actual water depth.
 
Alvorada

Alvorada

.
Apr 25, 2010
35
Beneteau 331 Herrington Harbor South (Friendship, MD)
Duhh...why didn't i think of that

Thanks for the reply. We had seemed to recall 1.5 too but were not positive. We will use this method to confirm. Some times common sense escapes me...thanks for the reminder and good advice.
 
C

Captn TJ

.
Nov 24, 2012
586
Alvorada said:
Thanks for the reply. We had seemed to recall 1.5 too but were not positive. We will use this method to confirm. Some times common sense escapes me...thanks for the reminder and good advice.
Click to expand
Any reason why you don't have the offset calibrated to the bottom of the keel? Makes it a lot simpler.
 
py26129

py26129

.
Oct 25, 2011
576
Island Packet IP31 Lake St. Louis, Montreal
...and just to be a little contrary, why not leave it alone and use the 1.5' as yoru safety margin :)

Mat
 
Alvorada

Alvorada

.
Apr 25, 2010
35
Beneteau 331 Herrington Harbor South (Friendship, MD)
The only good reason for both is personal preference. We tried with the full offset but just liked seeing actual. Having the margin of error is interesting too. Thanks.
 
Ron20324

Ron20324

.
Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
Captn TJ said:
Any reason why you don't have the offset calibrated to the bottom of the keel? Makes it a lot simpler.
Click to expand
Sometimes the crew want to look at the actual water depth reading if they are going swimming.
 
Status
Not open for further replies.

Top Bottom