Selecting hull unit
The SU90 system can be provided with different hull units. The main difference between these hull units is the length of the transducer shaft, and thus also the physical height of the entire hull unit assembly. The same transducer is used on all hull unit types.
Context
The hull unit is used to lower the transducer down below the ship’s hull when the SU90 system shall be used. When the SU90 system is turned off, the transducer is hoisted for protection.
Caution
If the transducer hits larger objects or bottom, the transducer shaft may be bent, or - in worst case - it can be broken off. A broken transducer shaft will cause water leakage through the top of the shaft. If you suspect that the transducer shaft is seriously damaged with holes, do not retract the transducer to its upper position.
To prevent serious damage to the vessel or the vessel stability, you must have a water pump and a warning system in the sonar room.
Procedure
1 Open the Setup menu.
2 On the Setup menu, select Installation.
Image
Observe that the Installation dialog box opens. This dialog box contains a number of pages selected from the menu on the left side.
3 On the left side of the Installation dialog box, select Hull Unit Configuration to open the page.
4 Select which type of hull unit that has been installed.
5 At the bottom of the page, select Apply to save your settings.
6 Continue your work in the Installation dialog box, or select OK to close it.
Further requirements
The choices you make are vital for all operation. You must only make these choices once. Accidental changes to the hull unit settings may cause damage to your SU90 system.