Section
1 General
1.1 Application
1.1.1 The
requirements of this Chapter apply to ships with installed dynamic
positioning systems and are additional to those applicable in other
Parts of these Rules.
1.1.2 A ship
provided with a dynamic positioning system in accordance with these
Rules will be eligible for an appropriate class notation which will
be recorded in the Register Book.
1.1.3 Requirements,
additional to these Rules may be imposed by the National Administration
with whom the ship is registered and/or by the administration within
whose territorial jurisdiction it is intended to operate. Where national
legislative requirements exist, compliance with such regulations shall
also be necessary.
1.1.4 For
the purpose of these Rules, dynamic positioning means the provision
of a hydrodynamic system with automatic and/or manual control capable
of maintaining the heading and position of the ship during operation
within specified limits and environmental conditions.
1.1.6 Special
consideration will be given where the dynamic positioning system is
used primarily for purposes other than position keeping, e.g. track
following. A descriptive note may be entered in column 6 of the Register
Book to this effect.
1.2 Classification notations
1.2.1 Ships
complying with the requirements of this Chapter will be eligible for
one of the following class notations, as defined in Pt 1, Ch 2 Classification Regulations:
-
DP(CM)
See
Pt 7, Ch 4, 2 Class notation DP(CM).
-
DP(AM)
See
Pt 7, Ch 4, 3 Class notation DP(AM).
-
DP(AA)
See
Pt 7, Ch 4, 4 Class notation DP(AA).
-
DP(AAA)
See
Pt 7, Ch 4, 5 Class notation DP(AAA).
1.2.3 Additional
descriptive notes may be entered in column 6 of the Register
Book indicating the type of position reference system, control
system, etc.
1.2.4 Where
a DP notation is not requested, dynamic positioning systems
are to be installed in accordance with the requirements of Pt 7, Ch 4, 2 Class notation DP(CM) as far as is practicable.
1.3 Information and plans required to be submitted
1.3.2 Details
of the limits of the area of operation and heading deviations, together
with proposals for redundancy and segregation provided in the machinery,
electrical installations and control systems, are to be submitted.
These proposals are to take account of the possible loss of performance
capability should a component fail or in the event of fire or flooding, see also
Pt 7, Ch 4, 1.3 Information and plans required to be submitted 1.3.6 and Pt 7, Ch 4, 4 Class notation DP(AA) and Pt 7, Ch 4, 5 Class notation DP(AAA).
1.3.3 Where
a common power source is utilized for thrusters, details of the total
maximum load required for dynamic positioning are to be submitted.
1.3.4 Plans
of the following, together with particulars of ratings in accordance
with the relevant Parts of the Rules, are to be submitted for:
-
Prime movers,
gearing, shafting, propellers and thrusters.
-
Machinery piping
systems.
-
Electrical installations.
-
Pressure vessels
for use with dynamic positioning system.
1.3.5 Plans
of control, alarm and safety systems, including the following, are
to be submitted:
-
Functional block
diagrams of the control system(s).
-
Functional block
diagrams of the position reference systems and the environmental sensors.
-
Details of the
electrical supply to the control system(s), the position reference
system(s) and the environmental sensors.
-
Details of the
monitoring functions of the controllers, sensors and reference systems,
together with a description of the monitoring functions.
-
List of equipment
with identification of the manufacturer, type and model.
-
Details of the
control stations, e.g. control panels and consoles, including the
location of the control stations.
-
Test schedules
(for both works testing and sea trials) that are to include the methods
of testing and the test facilities provided.
1.3.6 For
assignment of DP(AA) or DP(AAA) notation,
a Failure Mode and Effects Analysis (FMEA) is to be submitted, demonstrating
that adequate segregation and redundancy of the machinery, the electrical
installation and the control systems have been achieved in order to
maintain position in the event of equipment failure (see
Pt 7, Ch 4, 4 Class notation DP(AA)); or fire or flooding, see
Pt 7, Ch 4, 5 Class notation DP(AAA). The FMEA is to take a formal
and structured approach and is to be performed in accordance with
an acceptable and relevant national or international standard, e.g.
IEC 60812.
1.3.7 Where
the DP notation is to be supplemented with a Performance Capability
Rating (PCR) (see
Pt 7, Ch 4, 1.2 Classification notations 1.2.2), the following information
is to be submitted for assignment of a PCR:
-
Lines plan.
-
General arrangement.
-
Details of thruster
arrangement.
-
Thruster powers
and thrusts.
1.3.8 Details
of the intended modes of operation are to be submitted. As a minimum,
these are to include:
-
a description
of all the intended operating modes;
-
details of the
system configuration required for each mode of operation. When applicable,
this is to include the configuration needed to meet the FMEA requirements
of Pt 7, Ch 4, 1.3 Information and plans required to be submitted 1.3.6; and
-
the procedures
which are to be followed in each operating mode during normal and
abnormal conditions.
1.3.9 A set
of the operation and maintenance manuals is to be placed and retained
on board the ship.
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