Paul_f7
Active Member
Does anyone know the value to be set on the depth gauge for the sounding offset. Thanks
Princess 54 Fly Depth Gauge Offset
- Thread starter Paul_f7
- Start date
kashurst
Well-Known Member
I always set mine to zero. Depth gauge I use as insurance. I want to know how much water is below the keel. Navigators job is to make sure there is plenty.
QBhoy
Well-Known Member
1.27 metres or just over 4ft, you’d imagine. That’s the draft of them, as far as the specs suggest.
Hurricane
Well-Known Member
I agree with kashurst and like to think of depth below the keel.
But we boat in the Med these days where tidal concern aren't as great as in the UK
But we boat in the Med these days where tidal concern aren't as great as in the UK
henryf
Well-Known Member
I also have the depth gauge set to show depth under the keel. Tide tables - well actually the chart plotter calculation these days coupled with local knowledge allows me to decide whether or not I can venture somewhere in the first place.
Confirming position in relation to chart depth takes a bit of mental arithmetic to add back the keel depth from the water line. On our P50 I add on 1.4-1.5m.
Confirming position in relation to chart depth takes a bit of mental arithmetic to add back the keel depth from the water line. On our P50 I add on 1.4-1.5m.
Paul_f7
Active Member
Thanks everyone, but I am looking for the measurement between the transducer and the bottom of the props so the depth gauge provides depth under props.
henryf
Well-Known Member
Ah I see. I would add 0.5 metres to clear the props and rudders. This was our P50 a few weeks ago.
In reality I set a mental limit of 1m depth (under the keel) as an absolute minimum. In practice I’ve seen 0.8m a few times particularly when coming into Newtown Creek but never over 25 knots.
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In reality I set a mental limit of 1m depth (under the keel) as an absolute minimum. In practice I’ve seen 0.8m a few times particularly when coming into Newtown Creek but never over 25 knots.
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colhel
Well-Known Member
Drive around till you hear a clunk, then press zero.
Mr Googler
Well-Known Member
Not offsetting seems a bit odd?
off set it by 2.0m…..then if it ever reads 0….you’ve got 1.0 margin minimum
what’s the big curved section? Bit in the way of the stern thruster?
off set it by 2.0m…..then if it ever reads 0….you’ve got 1.0 margin minimum
what’s the big curved section? Bit in the way of the stern thruster?
kashurst
Well-Known Member
I used to do that. Then in our early days on rivers etc shallow water is a big issue. So when encountering a shallow spot I would get spooked - did I add an offset? , If so what was it? Can't remember. How much water have I got? In the end I just set it to zero
Mr Googler
Well-Known Member
Makes sense
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henryf
Well-Known Member
Part of the hull. Accommodates the rudder stock.