1.1 Under regulation II-1/3-8 of the 1974 SOLAS Convention, as adopted by
resolution MSC.473(102), new displacement type ships, except high-speed craft and
offshore units, shall be provided with arrangements, equipment and fittings of
sufficient safe working load to enable the safe conduct of all towing and mooring
operations associated with the normal operations of the ship. The arrangements,
equipment and fittings shall meet the appropriate requirements of the Administration or
an organization recognized by the Administration.
1.2 The Revised guidance on shipboard towing and mooring equipment
(MSC.1/Circ.1175/Rev.1) should apply to ships constructed on or after 1 January 2024. To
ships constructed on or after 1 January 2007 and before 1 January 2024, the Guidance
on shipboard towing and mooring equipment (MSC.1/Circ.1175) should apply
1.3 This circular provides standards for the design and construction of shipboard
fittings and supporting hull structures associated with normal towing and mooring
operations in harbours or sheltered waters, which Administrations are recommended to
implement. This circular also contains design guidance for fittings of ships that are
further intended to be towed by another ship or tug, e.g. in an emergency. This circular
does not require tow lines nor mandate standards for mooring lines on board the ship.
Furthermore, this guidance is not applicable to the design and construction of shipboard
fittings and supporting hull structures used for special towing services defined as:
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.1 Escort towing: Towing service required in some estuaries to control the
ship in case of failures of the propulsion or steering system. It should be
referred to local escort requirements;
.2 Canal transit towing: Towing service for ships transiting canals, e.g.
the Panama Canal. It should be referred to local canal transit requirements; and
.3 Emergency towing for tankers: Towing service to assist tankers in case
of emergency. It should be referred to paragraph 1 of SOLAS regulation
II-1/3-4.
1.4 Equipment that is used for both towing and mooring should be in accordance with
sections 3 and 4.