Have added a sonar module to the Raymarine
network on our L400 so we can find fish
as well as get a better guide to the bottom type when time to anchor
All goes well until we try to find a suitable place for the Airmar P79 "in hull" transducer. Not wishing to cut any more holes in the hull
and being impatient to fish
rather than haul out
to fit a " through hull" bronze transducer, I thought the in hull
'ducer would do the trick. Especially as the hull bottom is solid fibreglass rather than the cored laminate that these transducer can't tolerate.
No luck! Just a gobbledygook read out. Tried the suggested trial using a plastic bag containing transducer and water
in several hull places. I even tried to mount the wet box in a likely spot 2 feet forward of the keel
, but no useful readout. Hang the transducer out the back and the read out is perfect. Not sure why. Perhaps the laminate is not composed of uniform materials. Maybe it has air in the layup
( god forbid!) or some other technical issue that I'm ignorant of.
Anyone been here and done that? Otherwise it's a new through hull transducer, a haul out
and a hole saw. Cheers!