Prevention of Pollution by ships -Marpol Annex II (Noxious Liquid Substances in Bulk)
Annex II (Noxious Liquid Substances in Bulk): This Annex entered into force on 6th April 1987. It
contains regulations for the control of pollution by noxious
liquid substances carried in bulk. It is the first attempt to
control, on an international basis, the discharge of tank
washings and other residues of liquid substances (other
than oil) carried in bulk. These substances are
mainly petrochemicals but include other chemicals,
vegetable oils, coal-derived oils, and other substances
categorized as noxious liquid substances following
defined guidelines.
This Annex also contains requirements
for standards of construction of chemical tankers and other
ships carrying these substances, to minimize
accidental discharge into the sea of such substances.
The United Kingdom domestic legislation to implement
this Annex was the Merchant Shipping (Control of
Pollution by Noxious Liquid Substances in Bulk)
Regulations of 1987.
The regulations apply to all ships carrying noxious
liquid substances in bulk and contain, among other things, provisions
to reduce operational and accidental pollution from ships
and require ships to be fitted with equipment to reduce the
amount of residues of noxious liquid substances in the
the ship’s cargo tanks to the minimum when unloading. The
regulations impose restrictions on the quantities of residues
that can be discharged into the sea, the rate of discharge
and where they can be discharged.
Discharges into the sea
of the most noxious of these liquid substances are
prohibited and ships have to make use of reception
facilities ashore to dispose of residues. Ships are
required to carry and comply with a Manual of approved
procedures and arrangements, and to record all operations
involving these substances in a cargo record book.
All ships which carry noxious liquid substances are required to carry a Procedures and Arrangements Manual and are to be provided with the equipment specified in the manual. The ship specific operating instructions give details of the requirements
Categorisation of Noxious Liquid Substances :
These
substances are listed in the regulations and divided
according to their potential environmental hazard into four
categories as follows.
Category A:Noxious liquid substances which if
discharged into the sea from tank cleaning or
deballasting operations would present a major
hazard to either marine resources or human health
or cause serious harm to amenities or other
legitimate uses of the sea and therefore justify the
application of stringent anti-pollution measures.
Category B: Noxious liquid substances which if
discharged into the sea from tank cleaning or
deballasting operations would present a hazard to
either marine resources or human health or cause
harm to amenities or other legitimate uses of the
sea and therefore justify the application of special
anti-pollution measures.
Category C: Noxious liquid substances which if
discharged into the sea from tank cleaning or
deballasting operations would present a minor
hazard to either marine resources or human health
or cause minor harm to amenities or other
legitimate uses of the sea and therefore require
special operational conditions.
Category D: Noxious liquid substances which if
discharged into the sea from tank cleaning or
deballasting operations would present a
recognizable hazard to either marine resources or
human health or cause minimal harm to amenities
or other legitimate uses of the sea and therefore
require some attention in operational conditions.
The regulations also list substances which have been
evaluated and found to fall outside these categories and to
which the regulations do not apply. Other liquid substances
may not be carried in bulk unless they have been
evaluated.
Special and Particularly Sensitive Sea Areas. AnnexII
applies to the Antarctic, Baltic, and Black Sea Special Areas
and the Particularly Sensitive Sea Areas .
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