ISO 23116:2020

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 23116
ISO/TC 8/SC 4
Ships and marine technology — Ship’s
Secretariat: SAC
mooring and towing fittings — Seats
Voting begins on:
2020­05­27 for Panama chocks
Voting terminates on:
2020­07­22
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 23116:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2020

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ISO/FDIS 23116:2020(E)

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© ISO 2020
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ii © ISO 2020 – All rights reserved

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ISO/FDIS 23116:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
4.1 Type . 1
4.2 Nominal sizes . 2
5 Dimensions . 2
6 Materials . 2
7 Construction . 2
8 Manufacturing and inspection . 2
9 Marking . 2
Annex A (normative) Basis for strength assessment of the seats for Panama chocks .9
Bibliography .14
© ISO 2020 – All rights reserved iii

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ISO/FDIS 23116:2020(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non­governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
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www .iso .org/ iso/ foreword .html.
This document was prepared Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

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ISO/FDIS 23116:2020(E)

Introduction
The seat for Panama chocks is a seat type of ship’s mooring and towing fitting installed on the shipside
to lead the mooring and towing rope from the ship’s inboard to outboard.
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 23116:2020(E)
Ships and marine technology — Ship’s mooring and towing
fittings — Seats for Panama chocks
1 Scope
This document specifies the types, nominal sizes, dimensions and materials, as well as construction,
manufacturing and marking requirements, for the seats for Panama chocks installed to lead the
mooring and towing rope of a ship. It is applicable to ships passing through the Panama Canal, which
are normally assisted by locomotives using steel towing wires and/or by tug boats. These seats for
chocks meet normal mooring requirements and Panama Canal requirements.
NOTE The seat for Panama chocks (SWL of 90 tons) for Panamax Plus and Neopanamax vessels can be
replaced by seats for closed chocks (see ISO 23113).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
IMO Circular MSC/Circ.1175, Guidance on shipboard towing and mooring equipment
Panama Canal Requirements — OP Notice to shipping No. N-1-2018 — Vessel requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
safe working load
SWL
safe load limit (maximum permissible load) of the fittings used for mooring and towing
4 Classification
4.1 Type
The seat for Panama chocks shall be classified by its installation site as belonging to one of the
following types:
a) Type A: seat for deck-mounted Panama chock;
b) Type B: seat for deck and side shell-mounted Panama chock;
c) Type C: brackets for bulwark-mounted Panama chock.
© ISO 2020 – All rights reserved 1

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ISO/FDIS 23116:2020(E)

4.2 Nominal sizes
The nominal sizes of the seats for the Panama chocks are denoted by reference to the width of the
opening, in millimetres.
The nominal sizes are 310 and 360.
5 Dimensions
The seats for Panama chocks shall have dimensions and particulars in accordance with Tables 1, 2 and
3, and Figures 1, 2 and 3.
6 M
...