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1 In every oil tanker,
a discharge manifold for connection to reception facilities for
the discharge of dirty ballast water or oil-contaminated water shall
be located on the open deck on both sides of the ship.
2 In every oil tanker
of 150 gross tonnage and above, pipelines for the discharge to the
sea of ballast water or oil-contaminated water from cargo tank areas
which may be permitted under regulation 34
of this Annex shall be led to the open deck or to the ship's side
above the waterline in the deepest ballast condition. Different
piping arrangements to permit operation in the manner permitted
in subparagraphs 6.1 to 6.5 of this regulation may be accepted.
SEE INTERPRETATIONS 49.1.1 TO
49.1.4
3 In oil tankers of 150 gross tonnage
and above delivered after 31 December 1979, as defined in regulation
1.28.2, means shall be provided for stopping
the discharge into the sea of ballast water or oil-contaminated
water from cargo tank areas, other than those discharges below the
waterline permitted under paragraph 6 of this regulation, from a
position on the upper deck or above located so that the manifold
in use referred to in paragraph 1 of this regulation and the discharge
to the sea from the pipelines referred to in paragraph 2 of this
regulation may be visually observed. Means for stopping the discharge
need not be provided at the observation position if a positive communication
system such as a telephone or radio system is provided between the
observation position and the discharge control position.
4 Every oil tanker delivered after
1 June 1982, as defined in regulation 1.28.4,
required to be provided with segregated ballast tanks or fitted
with a crude oil washing system, shall comply with the following
requirements:
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.1 |
it shall be equipped with oil piping so designed
and installed that oil retention in the lines is minimized;
and |
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.2 |
means shall be provided to drain all cargo
pumps and all oil lines at the completion of cargo discharge,
where necessary by connection to a stripping device. The line
and pump draining shall be capable of being discharged both
ashore and to a cargo tank or a slop tank. For discharge ashore
a special small diameter line shall be provided and shall be
connected outboard of the ship's manifold valves. |
SEE INTERPRETATIONS 50.1 TO 50.3
5 Every crude oil tanker delivered
on or before 1 June 1982, as defined in regulation 1.28.3,
required to be provided with segregated ballast tanks, or to be
fitted with a crude oil washing system, shall comply with the provisions
of paragraph 4.2 of this regulation.
6 On every oil tanker the discharge
of ballast water or oil-contaminated water from cargo tank areas
shall take place above the waterline, except as follows:
| .1 |
Segregated ballast and clean ballast
may be discharged below the waterline: |
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.1.1 |
in ports or at offshore terminals,
or |
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.1.2 |
at sea by gravity, or |
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.1.2 |
at sea by pumps if the ballast
water exchange is performed under the provisions of regulation
D-1.1 of the International Convention for the Control and Management
of Ships' Ballast Water and Sediments, |
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provided that the surface of the
ballast water has been examined either visually or by other
means immediately before the discharge to ensure that no contamination
with oil has taken place. |
| .2 |
Oil tankers delivered on or before
31 December 1979, as defined in regulation 1.28.1,
which, without modification, are not capable of discharging
segregated ballast above the waterline may discharge segregated
ballast below the waterline at sea, provided that the surface
of the ballast water has been examined immediately before the
discharge to ensure that no contamination with oil has taken
place. |
| .3 |
Oil tankers delivered on or before
1 June 1982, as defined in regulation 1.28.3,
operating with dedicated clean ballast tanks, which without
modification are not capable of discharging ballast water from
dedicated clean ballast tanks above the waterline, may discharge
this ballast below the waterline provided that the discharge
of the ballast water is supervised in accordance with regulation
18.8.3 of this Annex. |
| .4 |
On every oil tanker at sea, dirty
ballast water or oilcontaminated water from tanks in the cargo
area, other than slop tanks, may be discharged by gravity below
the waterline, provided that sufficient time has elapsed in
order to allow oil/ water separation to have taken place and
the ballast water has been examined immediately before the discharge
with an oil/ water interface detector referred to in regulation
32 of this Annex, in order to ensure that
the height of the interface is such that the discharge does
not involve any increased risk of harm to the marine environment. |
| .5 |
On oil tankers delivered on or
before 31 December 1979, as defined in regulation 1.28.1,
at sea dirty ballast water or oilcontaminated water from cargo
tank areas may be discharged below the waterline, subsequent
to or in lieu of the discharge by the method referred to in
subparagraph 6.4 of this paragraph, provided that: |
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.5.1 |
a part of the flow of such water
is led through permanent piping to a readily accessible location
on the upper deck or above where it may be visually observed
during the discharge operation; and |
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.5.2 |
such part flow arrangements comply
with the requirements established by the Administration, which
shall contain at least all the provisions of the Specifications
for the Design, Installation and Operation of a Part Flow System
for Control of Overboard Discharges adopted by the Organization.* |
SEE INTERPRETATION 51
7 Every oil tanker of 150 gross tonnage
and above delivered on or after 1 January 2010, as defined in regulation
1.28.8, which has installed a sea chest
that is permanently connected to the cargo pipeline system, shall
be equipped with both a sea chest valve and an inboard isolation
valve. In addition to these valves, the sea chest shall be capable
of isolation from the cargo piping system whilst the tanker is loading,
transporting, or discharging cargo by use of a positive means that
is to the satisfaction of the Administration. Such a positive means
is a facility that is installed in the pipeline system in order
to prevent, under all circumstances, the section of pipeline between
the sea chest valve and the inboard valve being filled with cargo.
SEE INTERPRETATION 52
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