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Procedure
1
Make sure that you have sufficient water depth below the keel before you lower
the transducer.
2
Select
Hull Unit
3
To lower the transducer select
4
To hoist the transducer select
5
To move the transducer to its predefined middle position, select
.
Middle
Retracting the transducer to a middle position may be useful if you use the SN90
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.
Related topics
Getting started, page 51
Turning on the SN90, page 51
Turning off the SN90, page 53
Turning off the SN90
When you do not use the SN90, turn off the entire system. To power down the three
Power Supply Units and the Transceiver Unit, use the functionality in the SN90 program.
When you do not use the SN90, turn off the display and the Processor Unit.
A hull unit may be provided as an optional method to lower and hoist the transducer.
This task assumes that a hull unit is installed. If a hull unit is not installed you can
disregard information related to lowering and hoisting the transducer.
Procedure
1
Select
Power Off
In the
Power Off
•
turns off the Processor Unit and the Transceiver Unit.
Power Off
•
Exit to Operation System
Transceiver Unit.
• Both functions will also retract the transducer.
or:
2
On the Operating Panel, press
381295/B
on the top bar to open the
.
Down
.
Up
on the top bar.
dialog box, select
Power off
closes the SN90 program, and turns off the
, and keep it depressed for a few seconds.
Power
Operating procedures
dialog box.
Hull Unit
or
Exit to Operating System
.
53
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