About the hull unit installation
The hull unit provided with the CS90 is designed to lower the transducer down below the ship’s hull when the CS90 shall be used. When the CS90 is switched off, the transducer is hoisted for protection. The hull unit is a large and crucial part of the sonar system.
The CS90 Fish Finding Sonar can be provided with one of the following hull units.
Hull Unit Part
number
Lowering
depth
Transducer
cables
Maximum
speed
CS90 439051 1.0 m 4.6 m 20 knots
439054 10 m 20 knots
CS94 439057 2.1 m 4.6 m 19 knots
439058 m 19 knots
Outline dimensions drawings:
- CS90: 439719
- CS94: 439723
This chapter describes the installation of the CS94 Hull Unit.
Note
Due to its physical size and weight, and the fact that the installation trunk penetrates the vessel hull, it is very important that the hull unit is installed and secured properly.
The hull unit shall be mounted on top of the installation trunk at the bottom of the hull. The installation trunk penetrates the ship’s hull, and allows the transducer to be lowered into the sea. The hull unit is normally located in the forward part of the vessel.
The installation trunk is not used when a gate valve is mounted.The installation trunk is replaced with a transducer dock.
Relevant cranes and lifting equipment must be available. Free access through the hull or the decks onto the top of the installation trunk must be provided.