Initial issue
Issue Date 25/06/2010
User Manual: 8142/8182 Transceivers
02 Technical and Functional
Page
10of 10
5
LUSBL
The transceiver can be used in a LUSBL configuration to provide a higher degree of accuracy in DP
applications.
5.1
DYNAMIC POSITIONING
For the DP application to function, with LUSBL, an array of transponders is placed on the seabed and
the position of the transponders or array in the vessel frame is reported to the DP control system. The
transceiver measures the range and bearing to multiple transponders in one ranging cycle, and
reporting the results.
5.2
UNDERWATER POSITIONING
The greater accuracy of the LUSBL system is required, when the position of an underwater structure
needs to be known more accurately, than can be achieved by any other method. By deploying more
than one transponder, the LUSBL is able to use statistical filtering techniques to reduce the impact of
system errors.
5.3
MARINE RISER ANGLE MONITORING
Setup and control functions for a Marine Riser Angle Monitoring System (MRAMS) are built into the
L/USBL system. The MRAMS alarm levels may be displayed on the L/USBL screen while in
Navigation mode. The MRAMS constantly measures the angle between the Blow-Out Preventer
(BOP) and the riser.
Summary of Contents for 8142-000-01
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