Installation manual

On-board maintenance
171
850-164186 / Rev.D
Hull unit
General
The sonar hull unit must be under continuous watch as a part of
the vessel’s machinery. As the hull unit may be exposed to
severe strain because of pitching and vibrations, it must be
inspected regulary for loose parts.
Topics
 Hull unit familiarization, SP75 (Standard), page 172
 Hull unit familiarization, SP71 - SP74, page 173
 Hull unit familiarization, SP70, page 174
 Precautions when docking the vessel, page 175
 Cleaning the transducer, page 177
 Hoist motor overload protection, page 178
 Emergency hoisting and lowering, page 179
 Air bleeding, page 181
 Lubrication, SP75 Hull Unit (standard), page 182
 Lubrication, SP71, SP72, SP73 and SP74, page 183
 Lubrication, SP70 Hull Unit, page 184