Theoretically, it is possible to install the transducer in a blister under the hull, or even through the hull plating. These
are not good solutions. We strongly recommend that the transducer is installed in a drop keel. Due to the functionality and scientific results required by the MS70, the transducer installation must be done with a high degree of accuracy.
A drop keel is a superior platform for the MS70 transducer. Drop keels are often used on larger research vessels. A drop keel will frequently protrude as far as three meters below the hull. At that depth, the water is free of air bubbles up, even during very high sea states. The vessel is then able to do reliable acoustic measurements in open sea a larger part of the year.
At the bottom of the drop keel, the MS70 transducers is installed vertically with its face flushed with the keel side plating. The mounting ring is welded to the hole prepared for the transducer. Bolts through the clamping ring into the mounting ring will secure the transducer in place.
The transducer cables must be properly fastened at the bottom of the drop keel, and fully supported while lowering and hoisting the drop
keel.
The drop keel is normally used for several echo sounder transducers.
NoteObserve the installation principles.