294
442704/A
Related topics
Maintenance procedures, page 186
Preventive maintenance, page 272
Preventive maintenance schedule, page 273
Approved anti-fouling paints, page 276
Preventive maintenance procedures, page 278
Inspecting and replacing sacrificial anodes
Sacrificial anodes are used to protect the hull unit and the installation trunk from corrosion.
They are mounted under the mounting flange at the top of the installation trunk. Additional
sacrificial anodes may have been mounted by the shipyard during the installation of the
ST90 system.
Prerequisites
The vessel is in dry dock. The ST90 system is turned off. No special tools are required
for this task. If the sacrificial anodes need to be replaced, you will need the necessary
spare items as well as mounting materials. Contact your local dealer or distributor, or the
Kongsberg Maritime support organization, for spare parts.
•
Kongsberg Maritime part number
: 629-204660
• Mounting bolts: M8x40
• Spring lock washers
• Nuts
Two persons are needed to do the task.
• One person must stay in the sonar room to operate the hull unit.
• One person must stay in the dry dock, under the hull, to make sure that the transducer is
not lowered too far down.
Proper oral communication must exist between the sonar room and the dry dock personnel.
Context
Sacrificial anodes are slowly disintegrating during normal wear and tear. They must be
inspected whenever the vessel is in dry dock. If the sacrificial anodes are damaged or
severely corroded you must replace them. We recommend that the sacrificial anodes are
replaced when 1/3 of their bodies have been spent.
Procedure
1
Make sure that all power to the hull unit is disconnected.
2
Access the location of the sacrificial anodes.
Simrad ST90 Reference Manual
Summary of Contents for Simrad ST90
Page 1: ...kongsberg com simrad Simrad ST90 REFERENCE MANUAL ...
Page 2: ......
Page 337: ...442704 A 335 Related topics Sonar views page 326 User interface ...
Page 413: ...442704 A 411 Related topics Menu system page 375 Display menu page 384 Menu system ...
Page 631: ...442704 A 629 Related topics Concept descriptions page 626 Concept descriptions ...
Page 687: ......
Page 688: ... 2021 Kongsberg Maritime ISBN 978 82 8066 211 8 ...
Page 689: ......
Page 690: ...Reference Manual Simrad ST90 ...