SC212SC212(cont)（Sept2006）(Corr.1
July 2007)(Corr.2
Oct 2007)(Corr.3
Dec 2019)(Rev.1
Nov 2023
CompleteRevision)

Shipboard fittings and supporting hull
structures associated with towing and mooringon conventional vessels
Interpretation of the Reg. II-1/3-8 of the SOLAS as amended by Resolution
MSC.474(102)Regulation II-1/ 3-8 reads as follows:1

Paragraphs 4 to 6 of this regulation apply to ships constructed on or after 1 January 2007.

2

Paragraphs 7 and 8 of this regulation only apply to ships:.1 for which the building contract is placed on or after 1 January 2024; or.2 in the absence of a building contract, the keel of which is laid or which is at a similarstage of construction on or after 1 July 2024; or.3 the delivery of which is on or after 1 January 2027.

3 This regulation does not apply to towing arrangements provided in accordance withregulation 3-4.
4 Ships 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 operation of the ship.

Note:
1. This Unified Interpretation is to be uniformly implemented by IACS Societies on ships
constructed on or after 1 January 2007.
2. The “date of contract for construction” date means the date on which the contract to build
the vessel is signed between the prospective owner and the shipbuilder. For further details
regarding the date of “contract for construction”, refer to IACS Procedural Requirement(PR) No. 29.
3. Revision 1 of this UI is to be uniformly implemented by IACS Societies;- for interpretations 2 and 3, on ships contracted for construction on or after 1 January2024, and-for interpretations 1, 4 and 5, on or after 1 January 2024.

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5 Arrangements, equipment and fittings provided in accordance with paragraph 4 above
shall meet the appropriate requirements of the Administration or an organization recognizedby the Administration under regulation I/6.*(cont)* Refer to the Guidance on shipboard towing and mooring equipment(MSC.1/Circ.1175) for ships constructed on or after 1 January 2007 but before 1January 2024 and the Guidance on shipboard towing and mooring equipment(MSC.1/Circ.1175/Rev.1) for ships constructed on or after 1 January 2024.
6 Each fitting or item of equipment provided under this regulation shall be clearly marked
with any limitations associated with its safe operation, taking into account the strength of thesupporting ship's structure and its attachment to it.
7 For ships of 3,000 gross tonnage and above, the mooring arrangement shall be designed,
and the mooring equipment including lines shall be selected, in order to ensure occupationalsafety and safe mooring of the ship, based on the guidelines developed by the Organization.†
Ship-specific information shall be provided and kept on board. ‡† Refer to the Guidelines on the design of mooring arrangements and the selection ofappropriate mooring equipment and fittings for safe mooring (MSC.1/Circ.1619).
‡ Refer to towing and mooring arrangement plan in the Guidelines on the design ofmooring arrangements and the selection of appropriate mooring equipment andfittings for safe mooring (MSC.1/Circ.1619).
8 Ships of less than 3,000 gross tonnage should comply with the requirement in paragraph
7 above as far as reasonably practicable, or with applicable national standards of theAdministration.
9 For all ships, mooring equipment, including lines, shall be inspected and maintained in asuitable condition for their intended purposes. §§ Refer to the Guidelines for inspection and maintenance of mooring equipment
including lines (MSC.1/Circ.1620).
Interpretation
1 The expression "all ships" in SOLAS regulation II-1/3-8.9 means ships constructed before,on, or after 1 January 2009 in accordance with SOLAS regulation II-1/1.3.3
2 While applying the requirements of SOLAS regulation II-1/3-8.4 to regulation II-1/3-8.6
and SOLAS regulation II-1/3-8.8, for ships of less than 3,000 gross tonnage, the following
shall be confirmed:.1 the "Towing and mooring arrangements plan" shall be provided for information,
where the maximum brake holding load shall be included in addition to theinformation provided in section 5 (Towing and mooring arrangements plan) of theannex to MSC.1/Circ.1175/Rev.1. A technical specification document of the mooringlines supplied with the ship shall be provided for information. The manufacturers'
recommended minimum diameter D of each fitting in contact with the mooring lines
and the Line Design Break Force (LDBF) of the mooring lines shall be included in thedocument;

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SC212(cont).2 for confirmation of the appropriate selection of mooring line, the properties of mooringlines related to LDBF and bend radius (D/d ratio) shall be submitted to theAdministration or the RO. A warning shall be provided that the wear rate of lines may
be higher for lower diameter (paragraph 5.6 of MSC.1/Circ.1620); and.3 at delivery of the ship, the Administration or the RO shall confirm that the towing andmooring arrangements plan is provided on board.
3 While applying the requirements of SOLAS regulation II-1/3-8.4 to regulation II-1/3-8.6
and the SOLAS regulation II-1/3-8.7, for ships of 3,000 gross tonnage and above, thefollowing shall be confirmed in addition to those specified under paragraph 2 of thisinterpretation:.1 a document shall be provided by the designer for information and as a supplement to
the towing and mooring arrangements plan, confirming that MSC.1/Circ.1619 has
been considered. The document shall explicitly state that the deviations, if any, wereunavoidable;.2 deviations shall be recorded (paragraph 6.1 of MSC.1/Circ.1619), justification andsuitable safety measures shall be provided (paragraph 6.2 of MSC.1/Circ.1619) inthe supplement to the towing and mooring arrangements plan. A reference to thesupplement shall be included in the towing and mooring arrangements plan(paragraph 6.3 of MSC.1/Circ.1619);.3 if deviations are not found necessary, and the supplement is not needed, then thisshall be mentioned explicitly in the towing and mooring arrangements plan;.4 the mooring maximum brake holding load shall be less than 100% of the Ship Design
Minimum Breaking Load (MBLSD) (paragraphs 5.2.3.3 and 5.2.4 ofMSC.1/Circ.1619). The winches shall be fitted with brakes that allow for the reliablesetting of the brake rendering load; and.5 at delivery of the ship, the Administration or the RO shall confirm that the towing andmooring arrangements plan and the supplement describing deviations and suitablesafety measures is provided on board.
4 While applying the requirements of SOLAS regulation II-1/3-8.9, the following shall becomplied with, and compliance shall be confirmed by the surveyor at the initial survey for newships or at the first annual / intermediate / renewal survey for the issuance of the Cargo Ship
Safety Construction Certificate or renewal survey for the issuance of the Passenger Ship
Safety Certificate after 1 January 2024 for existing ships:.1 procedures for mooring operations, inspection and maintenance of mooring
equipment, including mooring lines, shall be established and available on board(paragraph 3.1 of MSC.1/Circ.1620), taking into account industry practices (section 7of MSC.1/Circ.1620);.2 procedures to allow the identification and control of mooring lines, tails andassociated attachments shall be established and available on board (paragraph 3.3of MSC.1/Circ.1620);.3 the periodic inspection of mooring lines, mooring line tails and associatedattachments shall be included in the onboard maintenance plan or equivalentmaintenance management system (paragraph 4.1.1 of MSC.1/Circ.1620);

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212(cont).4 manufacturersʹ criteria for replacement of mooring lines shall be available (paragraph4.3.1 of MSC.1/Circ.1620);.5 records of the original design concept, equipment, arrangements and specifications
shall be available on board (paragraph 4.4.4 of MSC.1/Circ.1620). For ships thekeels of which were laid before 1 January 2007 and without appropriate
documentation, owners may establish the MBLSD for mooring based on the safe
working load of mooring equipment provided on board. If no safe working load isspecified, then owners are advised to check strength of mooring equipment and theirsupporting hull structure based on MSC.1/Circ.1175/Rev.1 and determine MBLSD
based on actual capacity of the equipment and their supporting hull structure onboard. Manufacturers' test certificates for mooring lines, joining shackles andsynthetic tails shall be kept on board and properly linked back to the equipment, ifavailable (paragraph 6.2 of MSC.1/Circ.1620); and.6 a document shall be provided on board for gathering the information above anddescribing how the information listed above is filed and collected.
5 While applying the requirements of SOLAS regulation II-1/3-8.9, the following shall becomplied with, and the compliance shall be confirmed by the surveyor at every periodical
survey for endorsement/issue of the Cargo Ship Safety Construction Certificate or every
renewal survey for the Passenger Ship Safety Certificate after 1 January 2024 for existingships:.1 the records of inspection and maintenance of mooring equipment and inspection andreplacement of mooring lines, since the last periodical survey, shall be kept updated
and available on board (paragraphs 4.4.3 and 6.1 of MSC.1/Circ.1620).

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