Kongsberg SBP 29, Installation Manual

Page: 131 / 152

451253/A
131
Compass deviation requirements
SBP 29 units that are installed on the bridge may have an effect on the compass.
Once the installation is complete, the vessel must be swung with the SBP 29 in both
operative and inoperative modes.
The shipowner and captain are responsible for updating the compass deviation table
accordingly with regard to the vessel’s national registry and corresponding maritime
authority.
Noise sources
The operational performance of the SBP 29 Sub-bottom profiler depends on the noise
conditions. It is essential that the noise signature is as low as possible.
The vessel’s hull, rudder(s) and propeller(s) must be thoroughly inspected in dry dock
prior to installation.
Roughness below the water-line deformities in the shell plating and protruding obstacles
can create underwater noise. These sources of turbulence must be smoothed or removed
as best as possible.
Note
It is especially important that the propeller(s) are not pitted or damaged.
Dry docking requirements
Whenever devices for hydroacoustic use are mounted under the vessel’s hull, special
considerations must be made prior to dry docking.
Do not place supporting blocks or structures in the vicinity of the SBP 29.
The location of the SBP 29 must be noted on the vessel’s docking plan for future
reference.
Prior to dry docking, power down the SBP 29. Disengage the circuit breaker if necessary.
Label the Hydrographic Work Station and/or the circuit breaker clearly to prevent anyone
from powering up the SBP 29 accidentally.
Installation requirements