I have a Clipper Echo sounder with an in-hull installation
(sensor is within the hull
in an oil
To date I have always used castor oil
as the medium between the transducer & the inside of the hull
My oil is contaminated so I wish to replace it. Easy? No!
Apparently, castor oil has been declared dangerous to human constitutions & off limits so is no longer available so I would appreciate any advice on a suitable substitute oil – linseed, olive etc.
All thoghts gratefully received.