The SU90 system can be provided with one of the following hull units:
Hull Unit |
Lowering depth (m) |
Transducer cable (m) |
Maximum speed (knots) |
SU92 |
1.2 |
4.6 |
21 |
7 |
SU93 |
1.6 |
4.6 |
16 |
7 |
SU94 |
2.1 |
4.6 |
11 |
7 |
The same transducer is used on all hull unit types. |
If a Hull Unit Controller is supplied with the system, the Motor Control Unit cabinet is used as a
junction box. |
NoteDue 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 gantry must be secured to the bulkhead by means of mechanical support brackets. The dimensions and strength of the support brackets must be adequate to prevent vortex induced vibrations. This is an invariable requirement to ensure the safety of the SU90 system and the vessel.
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.
As a general recommendation, the hull unit shall be oriented with the hoisting motor pointing aft. If this orientation makes it difficult to access electrical connections, the hull unit may be rotated during its installation
to the most suitable direction.
Appropriate lifting equipment (lifting tackle, portable crane or ship’s crane) is required. Free access through the hull or the decks over the installation trunk must be provided.