HiPAP Model 501/451/351/101
46
317748/F
10
APPLICATIONS
10.1
Dynamic Positioning (DP) reference
The position data can be used by a DP system as the reference
signals for keeping the vessel in the desired position. High
position accuracy and reliability ensure a secure and stable
reference input to the DP systems. SSBL and LBL systems may
be used.
10.2
Subsea survey and inspection
Positioning of ROVs carrying instruments for survey and
inspection is another important application for the HiPAP®
system. The ROV position relative to the vessel is integrated
with the position from surface navigation to provide a
geographical position of the ROV. In this application, a
responder is suitable.
Tracking towed bodies for similar applications may also be
done. In survey applications, a best possible geographic position
is wanted. To obtain this, sound velocity and depth (pressure)
sensor input to the HiPAP® system may be used.
10.3
Rig and Riser monitoring
The HiPAP® system can be used to monitor the drill rig
position relative to the well/Blow Out Preventer (BOP). It can
also be used with inclinometer transponders to monitor the BOP
and riser inclination. For HSC 400, interface to electrical riser
angle measurement is available. Used with the Acoustic Control
Subsea (ACS 400) it can be used for BOP.
10.4
Acoustic Blow Out Preventer (BOP) control
The HiPAP® system is also used for transmitting and receiving
acoustic telemetry command with high security. This is used for
acoustic BOP control, which includes BOP valve operation and
monitoring critical functions by reading subsea status
information and sending this information to the operator
onboard the vessel.
A separate unit, the ACS 400, is required on the BOP stack. The
ACS 400 contains electronics and batteries for interfacing the
BOP.
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