About the installation trunk
The installation trunk provides the physical foundation for the entire hull unit. The installation trunk penetrates the hull. It is therefore a crucial part of the hull unit assembly. In order to ensure proper CS90 operation, the physical location of the installation trunk must be carefully selected.
Note
The installation trunk is not used when a gate valve is mounted. The installation trunk is replaced with a transducer dock.
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
The same transducer is used on all hull unit types.
Due to the different flange diameters, different installation trunks are used.
Installation trunk Upper
diameter
Bottom
diameter
Part
number
Drawing Blind flange
CS90 370 mm 273 mm 408615 402509 051344
CS94 760 mm 610 mm 427423 427176 207485
760 mm 356 mm 434529 434524
Image
The installation trunk - with a blind flange - can be ordered from Kongsberg Maritime as an optional delivery. As an alternative, the installation trunk can be manufactured by the shipyard based on the drawings in this manual. A locally manufactured installation trunk can be adjusted to better fit the properties of the vessel’s hull.
Note
The optional installation trunk offered by Kongsberg Maritime is approved by Det Norske Veritas (DNVGL), and includes a blind flange and a rubber gasket. If the installation trunk is manufactured locally, the installation shipyard is responsible for obtaining the approval certificates from the relevant national registry.