378-DP Operations Procedure / 748
DP Op
erations
P
rocedure
BOS-PRD-0701.900606
4.
6 DP
c
h
ec
k
s
p
rocedure.
x
DPO
operating on vessels as PSV – AHTS or FSIV
shall
use BOS DP checklist blank form.
x
DPO
shall
perform checks using DP “Arrival checklist” before entering within 500 meters of the
installation.
x
If customer’s procedure allows and if weather permitted, vessel can be manually steered up to 100
meters from offshore unit.
x
Engineer on duty
shall
fill up
Engine DP checklist
implemented by vessel’s Chief Engineer and
approved by the Captain.
x
As soon as the vessel is in DP auto mode,
DPO
shall
use BOS form
Bridge DP checklist watch
keeping and handover
.
x
DPO
operating on IMR vessel
shall
use all checklists already setup on board and not BOS blank
forms as per Vessel Filing System.
4.
7 DP O
nline
C
onse
q
uence
A
nal
y
sis
x
The DP Online Consequence Analysis function performs analysis to determine the vessel’s ability to
maintain its position and heading after predefined worst-case failure single equipment failure.
x
This function satisfies the requirements of IMO Equipment Class 2 and Equipment Class 3.
x
The analysis checks whether the thrusters remaining in operation after worst case single failure are
able to generate the same resultant thruster force and moment as required before the failure, and
whether the remaining generators are able to produce a sufficient amount of power. A warning
message is issued if a failure would result in lack of thrust or power, and subsequently drift-off.
x
These failures will be the loss of one complete switchboard, one Engine Room (for DP3), or a group
of thrusters that can be affected by a single equipment failure.
x
Consequence analysis are performed cyclically, every minute, whenever the following criteria are
satisfied:
x
The vessel is in AUTO Position Mode.
x
The position set point status is Present Position.
x
The heading set point status is Present Heading.
x
DP class 2 or DP class 3 is selected.
x
By default, the DP Online Consequence Analysis function is switched off.
Version 03. Original date: 13/02/2014. Version date: 31/12/2014. Valid version only on QMS site. Uncontrolled document when printed.
Procedure prepared by: BOS Project Coordinator. Approved by: BOS Senior of Operations Director. Validated by: BOS Quality Representative.
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