How to open
To open the Hull Unit Control dialog box, select Hull Unit on the top bar.
Description
To lower the transducer select Down. To hoist the transducer select Up. To move the transducer to its predefined middle position, select Middle.
The numerical value shown in the Hull Unit Control dialog box measures the vertical travelling distance. It stops when the transducer reaches the middle position, and shows you the vertical distance. It stops when the transducer is fully lowered, and shows you how far down this is. It stops when the transducer is fully retracted, and shows you that the vertical distance is 0 (zero).
TipRetracting the transducer to a middle position may be useful if you use the SN90 system simultaneously with other sonars. A higher position will permit you to increase the vessel speed. If you operate in very shallow waters, you may also reduce the risk of hitting bottom. However, placing the transducer immediately under the hull may increase the flow noise.
The SN90 system can be provided with one of the following hull units:
Hull Unit |
Lowering depth (m) |
Transducer cables (m) |
Maximum speed (knots) |
SN92H |
1.2 |
13 |
16 |
SN92HPX |
1.2 |
13 |
14 |
SN93H |
1.6 |
13 |
14 |
SN93HPX |
1.6 |
13 |
12 |
SN92HPX, SN93HPX: Two trawl hydrophones are added for use with a catch monitoring system. Both hydrophones point aft. |