4.1 Before every DP-operation, the DP-system should
be checked according to a vessel specific “location" check list
to make sure that the DP-system is functioning correctly and that
the system has been set up for the appropriate equipment class.
4.2 During DP-operations, the system should be
checked at regular intervals according to a vessel specific watchkeeping
checklist.
4.3 DP operations necessitating equipment class
2 or 3 should be terminated when the environmental conditions are
such that the DP-vessel will no longer be able to keep position if
the single failure criterion applicable to the equipment class should
occur. In this context deterioration of environmental conditions and
the necessary time to safely terminate the operation should also be
taken into consideration. This should be checked by way of environmental
envelopes if operating in equipment class 1 and by way of an automatic
consequence analysis if operating in equipment class 2 or 3. The necessary
operating instructions, etc., should be on board.
4.4 The following checklists, test procedures
and instructions should be incorporated into the DP operating manuals
for the vessel:
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.1 Location checklist (see 4.1).
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.2 Watchkeeping checklist (see 4.2).
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.3 DP-operation instructions (see 4.3).
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.4 Annual tests and procedures (see
5.1.1.3).
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.5 Initial and periodical (5-year) tests and procedures
(see
5.1.1.1 and 5.1.1.2).
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.6 Example of tests and procedures after modifications
and non-conformities (see
5.1.1.4).