NASA In Hull transducer mounting kit

This kit contains all the necessary components required for the installation of a standard size TRANSDUCER (38 mm), inside the hull of a vessel constructed of glass fibre. Although the thickness of the hull is not generally critical, some loss of deep water performance may be experienced. This kit is not recommended for use on glass fibre hulls over 19 mm (3/4”) in thickness, nor is it for use on aluminium, steel or wooden hulls.