•A practical choice would be somewhere between 1/3 and 1/2 of the boat’s length from the stern. For planing hulls, a practical location is generally rather far astern, so that the transducer is always in water regardless of the planing attitude.
2224
120120
30 | 28 |
68 
68 | 87 Unit: mm |
Thru-hull mount transducer mounting
dimensions (millimeters)
Acceptable transducer mounting locations
Position 1/2 to 1/3 of the hull
lfrom stern.
15 to 30 cm off center line (inside first lifting strakes.)
HIGH
lWithin the wetted bottom area Deadrise angle within 15°
Suitable transducer mounting locations
Typical thru-hull mount transducer installations
Flat Washer
Rubber Washer
Fairing
Block
Hull
Flat Washer |
|
Hull | Cork |
Rubber | Washer |
Washer |
|
Flat Hull
Typical thru-hull mount transducer installations
Procedure for installing the thru-hull mount transducer
1.With the boat hauled out of the water, mark the location chosen for mounting the transducer on the bottom of the hull.
2.If the hull is not level within 15° in any direction, fairing blocks made out of teak should be used between the transducer and hull, both inside and outside, to keep the transducer face parallel with the water line. Fabricate the fairing block as shown below and make the entire surface as smooth as possible to provide an undisturbed flow of water around the transducer. The fairing block should be smaller than the transducer itself to provide a channel to divert turbulent water around the sides of the transducer rather than over its face.
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