SIST EN ISO 12215-10:2021

Small craft - Hull construction and scantlings - Part 10: Rig loads and rig attachment in sailing craft (ISO 12215-10:2020)

This document specifies methods for the determination of:
— the design loads and design stresses on rig elements; and
— the loads and scantlings of rig attachments and mast steps/pillars;
on monohull and multihulls sailing craft.
It also gives, in Annexes, "established practices" for the assessment of mast steps/pillars or chainplates
NOTE 1 Other engineering methods can be used provided the design loads and design stresses are used.
This document is applicable to craft with a hull length LH up to 24 m but it can also be applied to craft up
to 24 m load line length.
NOTE 2 The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it is
smaller than LH. This length also sets up, at 24 m, the lower limit of several IMO conventions.
Scantlings derived from this document are primarily intended to apply to recreational craft, including
charter vessels.
This document is not applicable to racing craft designed only for professional racing.
This document only considers the loads exerted when sailing. Any loads that may result from other
situations are not considered in this document.
Throughout this document, and unless otherwise specified, dimensions are in (m), areas in (m2), masses
in (kg), forces in (N), moments in (N m), stresses and elastic modulus in N/mm2 (1 N / mm2 = 1 Mpa).
Unless otherwise stated, the craft is assessed in fully loaded ready for use condition.

Kleine Wasserfahrzeuge - Rumpfbauweise und Dimensionierung - Teil 10: Takelagelasten und Takelagezubehör von Segelbooten (ISO 12215-10:2020)

Dieses Dokument legt Verfahren fest für die Bestimmung:
- der Entwurfslasten und Entwurfsspannungen bei Takelageelementen und
- der Lasten und der Dimensionierung von Takelagezubehör und von Mastfüßen/Maststützen
bei Einrumpf- und Mehrrumpf-Segelfahrzeugen.
Außerdem sind in den Anhängen des Dokuments auch „bestehende Praktiken“ für die Bewertung von Mastfüßen/Maststützen oder Püttings angegeben.
ANMERKUNG 1 Weitere technische Verfahren können angewendet werden, vorausgesetzt, die Entwurfslasten und Entwurfsspannungen werden verwendet.
Dieses Dokument ist für Wasserfahrzeuge mit einer Rumpflänge LH von bis zu 24 m anwendbar, kann aber auch bei Wasserfahrzeugen von bis zu 24 m Konstruktionswasserlinie angewendet werden.
ANMERKUNG 2 Die Länge der Konstruktionswasserlinie ist in der IMO „International Load Lines Convention 1966/2005“ festgelegt und ist kleiner als LH. Diese Länge legt darüber hinaus bei 24 m die untere Grenze mehrerer IMO-Konventionen fest.
Dimensionierungen, die aus diesem Dokument hergeleitet wurden, sind in erster Linie dazu vorgesehen, für Freizeitboote, einschließlich Charterschiffe, angewendet zu werden.
Dieses Dokument ist nicht für Rennwasserfahrzeuge anwendbar, die ausschließlich für professionelle Rennen entworfen werden.
Dieses Dokument berücksichtigt ausschließlich die Lasten, die beim Segeln auftreten. Sämtliche Lasten, die durch andere Umstände entstehen können, werden in diesem Dokument nicht berücksichtigt.
In diesem Dokument, und sofern nicht anders festgelegt, sind die Abmessungen in (m), Flächen in (m2), Massen in (kg), Kräfte in (N), Momente in (Nm), Spannungen und Elastizitätsmodule in N/mm2 (1 N/mm2 = 1 Mpa) angegeben. Sofern nicht anders festgelegt, wird das Wasserfahrzeug im voll beladenen fahrbereiten Zustand bewertet.

Petit navires - Contruction de la coque et échantillonnage - Partie 10: Charges dans le gréement et points d'attache du gréement dans les bateaux à voiles (ISO 12215-10:2020)

Le présent document spécifie des méthodes pour la détermination:
—          des charges de conception et des contraintes de conception dans les éléments du gréement; et
—          des charges et des échantillonnages des points d'attache du gréement et du pied de mât/épontille;
sur les voiliers monocoques et multicoques.
Il donne également, dans des Annexes, des «pratiques établies» pour l'évaluation des pieds de mât/épontilles ou des cadènes.
NOTE 1 D'autres méthodes d'ingénierie peuvent être utilisées à condition que les charges et les contraintes de conception soient utilisées.
Ce document est applicable aux bateaux d'une longueur de coque LH inférieure ou égale à 24 m mais il peut également s'appliquer aux bateaux d'une longueur de ligne de charge inférieure ou égale 24 m.
NOTE 2    La longueur de la ligne de charge (longueur de référence) est définie dans la «Convention internationale sur les lignes de charge 1966/2005» de l'OMI, elle est inférieure à LH. Cette longueur établit également, à 24 m, la limite inférieure de plusieurs conventions de l'OMI.
Les échantillonnages provenant du présent document sont principalement destinés à s'appliquer sur les bateaux de plaisance, y compris les bateaux de location avec équipage (charter).
Ce document n'est pas applicable aux bateaux de course conçus uniquement pour des courses professionnelles.
Ce document ne considère que les charges exercées lors de la navigation. Les charges pouvant résulter d'autres situations ne sont pas prises en compte dans ce document.
Dans tout ce document, sauf indication contraire, les dimensions sont en (m), les surfaces en (m2), les masses en (kg), les forces en (N), les moments en (Nm), les contraintes et modules d'élasticité en N/mm2 (1 N / mm2 = 1 Mpa) Sauf indication contraire, le bateau doit être évalué en condition de pleine charge prête à l'emploi.

Mala plovila - Konstrukcija trupa in zahtevane lastnosti - 10. del: Obremenitve in pritrditve ladijske opreme na jadrnici (ISO 12215-10:2020)

General Information

• Status: Published
• Public Enquiry End Date: 21-Oct-2018
• Publication Date: 22-Nov-2020
• ICS: 47.020.10 - Hulls and their structure elements
• ICS: 47.080 - Small craft
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Nov-2020
• Due Date: 24-Jan-2021
• Completion Date: 23-Nov-2020
• Directive: 2013/53/EU - Directive 2013/53/EU of the European Parliament and of the Council of 20 November 2013 on recreational craft and personal watercraft and repealing Directive 94/25/EC
• Mandate: M/542 - [C(2015)8736] Standardisation Request to the European Committee for Standardisation and the European Committee for Electro-technical Standardisation as regards recreational craft and personal watercraft in support of Directive 2013/53/EU of the European Parliament and of the Council of 20 November 2013 on recreational craft and personal watercraft and repealing Directive 94/25/EC.
• Ref Project: EN ISO 12215-10:2020 - Small craft - Hull construction and scantlings - Part 10: Rig loads and rig attachment in sailing craft (ISO 12215-10:2020)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 12215-10:2021
01-januar-2021

Mala plovila - Konstrukcija trupa in zahtevane lastnosti - 10. del: Obremenitve in

pritrditve ladijske opreme na jadrnici (ISO 12215-10:2020)

Small craft - Hull construction and scantlings - Part 10: Rig loads and rig attachment in

sailing craft (ISO 12215-10:2020)
Kleine Wasserfahrzeuge - Rumpfbauweise und Dimensionierung - Teil 10:
Takelagelasten und Takelagezubehör von Segelbooten (ISO 12215-10:2020)

Petit navires - Contruction de la coque et échantillonnage - Partie 10: Charges dans le

gréement et points d'attache du gréement dans les bateaux à voiles (ISO 12215-
10:2020)
Ta slovenski standard je istoveten z: EN ISO 12215-10:2020
ICS:
47.020.10 Ladijski trupi in njihovi Hulls and their structure
konstrukcijski elementi elements
47.080 Čolni Small craft
SIST EN ISO 12215-10:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 12215-10:2021
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SIST EN ISO 12215-10:2021
EN ISO 12215-10
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 47.080
English Version
Small craft - Hull construction and scantlings - Part 10: Rig
loads and rig attachment in sailing craft (ISO 12215-
10:2020)

Petit navires - Contruction de la coque et Kleine Wasserfahrzeuge - Rumpfbauweise und

échantillonnage - Partie 10: Charges dans le gréement Dimensionierung - Teil 10: Takelagelasten und

et points d'attache du gréement dans les bateaux à Takelagezubehör von Segelbooten (ISO 12215-

voiles (ISO 12215-10:2020) 10:2020)
This European Standard was approved by CEN on 22 February 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12215-10:2020 E

worldwide for CEN national Members.
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SIST EN ISO 12215-10:2021
EN ISO 12215-10:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 12215-10:2021
EN ISO 12215-10:2020 (E)
European foreword

This document (EN ISO 12215-10:2020) has been prepared by Technical Committee ISO/TC 188 "Small

craft" in collaboration with CCMC.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by May 2021, and conflicting national standards shall be

withdrawn at the latest by May 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 12215-10:2020 has been approved by CEN as EN ISO 12215-10:2020 without any

modification.
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SIST EN ISO 12215-10:2021
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SIST EN ISO 12215-10:2021
INTERNATIONAL ISO
STANDARD 12215-10
First edition
2020-11
Small craft — Hull construction and
scantlings —
Part 10:
Rig loads and rig attachment in
sailing craft
Petit navires — Construction de la coque et échantillonnage —
Partie 10: Charges dans le gréement et points d'attache du gréement
dans les bateaux à voiles
Reference number
ISO 12215-10:2020(E)
ISO 2020
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols .......................................................................................................................................................................................................................... 3

5 Application of the document .................................................................................................................................................................... 4

5.1 General ........................................................................................................................................................................................................... 4

5.2 The simplified method ..................................................................................................................................................................... 4

5.3 The developed method .................................................................................................................................................................... 4

5.4 Steps of the methods and corresponding clauses of this document ......... ................................................ 5

6 Simplified and developed methods — Design stresses ................................................................................................ 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Design load vs safety factor .......................................................................................................................................................... 7

7 Developed method — General assessments, design moment ............................................................................... 8

7.1 General ........................................................................................................................................................................................................... 8

7.1.1 General topics on rigging design ........................................................................................................................ 8

7.1.2 Sail configurations: ........................................................................................................................................................ 9

7.1.3 Rigging loads and adjustment information to be provided ........................................................ 9

7.2 Design moment M : righting or heeling moment ..................................................................................................10

7.2.1 General...................................................................................................................................................................................10

7.2.2 Principle of design .......................................................................................................................................................10

7.2.3 Topics on multihulls/form stable sailing craft corresponding to case b) i.e.

with M < M .......................................................................................................................................................13

H1 R UP1
7.2.4 Downwind longitudinal force F and nose trimming moment
ADOWN
M , running under spinnaker alone — "Normal" (S ) or
HDOWN c6

"exceptional" (S ) .......................................................................................................................................................14

7.2.5 Maximum righting moment M , exceptional case, reaching under
RMAX

spinnaker .............................................................................................................................................................................14

7.2.6 Heeling force F and heeling moment M while broaching
ABROACH HBROACH

under spinnaker, exceptional case .................................................................................................................14

7.2.7 Minimum sail configuration and righting/heeling moment to be analyzed .............14

7.3 Rig dimensions, and default values for areas, forces and points of application ..........................15

7.4 Wing masts ..............................................................................................................................................................................................21

7.5 Resultant forces in sails ................................................................................................................................................................22

8 Loads in rigging elements — Developed method ............................................................................................................23

8.1 General ........................................................................................................................................................................................................23

8.2 Force in forestay, inner forestay, mainsail leech and on halyards ............................................................23

8.2.1 General...................................................................................................................................................................................23

8.2.2 Force in forestay, inner forestay, mainsail leech and on halyards connected

with sag .................................................................................................................................................................................24

8.2.3 Force in forestay to balance the longitudinal component of forces from aft

set shrouds, fixed/running backstays, mainsail leech ..................................................................24

8.3 Force in backstay, running backstays, or equivalent ...........................................................................................24

8.3.1 General...................................................................................................................................................................................24

8.3.2 Fractional rig with fixed backstay, no running backstay and aft angled

spreaders .............................................................................................................................................................................25

8.3.3 Case of rigs without fixed nor running backstay ...............................................................................25

8.4 Compression in the mast step/pillar ................................................................................................................................27

8.4.1 General...................................................................................................................................................................................27

8.4.2 Initial mast compression due to pre-stressing ...................................................................................27

© ISO 2020 – All rights reserved iii
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(E)

8.4.3 Mast compression due to heeling or broaching .................................................................................28

8.4.4 Design compression in the mast step/pillar .........................................................................................28

8.4.5 Detail topics on mast step/pillar ....................................................................................................................28

8.5 Final design load on rig elements ........................................................................................................................................28

9 Structural components to be assessed — Simplified or developed method .......................................29

9.1 General ........................................................................................................................................................................................................29

9.2 Mast steps and mast pillars and their connection to the craft's structure .......................................29

9.3 Chainplates and their connections to the craft's structure............................................................................29

9.4 Design details of chainplates and their connection to the structure .....................................................30

9.4.1 General...................................................................................................................................................................................30

9.4.2 Strapped FRP chainplates .....................................................................................................................................30

10 Application of the simplified method ..........................................................................................................................................31

11 Application of the developed method .........................................................................................................................................31

11.1 General ........................................................................................................................................................................................................31

11.2 General guidance for assessment by 3-D numerical procedures .............................................................31

11.2.1 General...................................................................................................................................................................................31

11.2.2 Material properties .....................................................................................................................................................32

11.2.3 Boundary assumptions ...........................................................................................................................................32

11.2.4 Load application ............................................................................................................................................................32

11.2.5 Model idealization .......................................................................................................................................................32

11.3 Assessment by ‘strength of materials’ based methods .....................................................................................32

12 Application of this document ...............................................................................................................................................................32

13 Information in the owner's manual ...............................................................................................................................................32

14 Information to the boat builder .........................................................................................................................................................33

Annex A (informative) Application sheet of ISO 12215-10 ........................................................................................................34

Annex B (informative) Information on metals and bolts .............................................................................................................36

Annex C (normative) Simplified "established practice" for mast step/pillar assessment ........................40

Annex D (normative) Simplified "established practice" for the assessment of

chainplatesand their connection ......................................................................................................................................................47

Annex E (informative) Simplified "established practice" calculation oftransverse rig

elements — Examples ..................................................................................................................................................................................69

Bibliography .............................................................................................................................................................................................................................77

iv © ISO 2020 – All rights reserved
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(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 non-governmental, 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).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.
This document was prepared by ISO/TC 188, Small craft.
A list of all parts in the ISO 12215 series can be found on the ISO website.

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.
© ISO 2020 – All rights reserved v
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(E)
Introduction

The reason underlying the preparation of the ISO 12215 series is that scantlings rules and recommended

practices for small craft differ considerably, thus limiting the general worldwide acceptability of craft.

This document has been set towards the minimal requirements of the current practice.

The dimensioning according to this document is regarded as reflecting current practice, provided

the craft is correctly handled in the sense of good seamanship and equipped and operated at a speed

appropriate to the prevailing sea state.

This document is not a design standard and designers/builders are strongly cautioned from attempting

to design craft such that nearly all structural components only just comply.

The connection between the rig attachment and the structure is required to be stronger than the rig

attachment itself. It is therefore considered that unforeseen overload will not entail its detachment

from the structure, and that the watertight integrity will be maintained.
vi © ISO 2020 – All rights reserved
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SIST EN ISO 12215-10:2021
INTERNATIONAL STANDARD ISO 12215-10:2020(E)
Small craft — Hull construction and scantlings —
Part 10:
Rig loads and rig attachment in sailing craft
1 Scope
This document specifies methods for the determination of:
— the design loads and design stresses on rig elements; and
— the loads and scantlings of rig attachments and mast steps/pillars;
on monohull and multihulls sailing craft.

It also gives, in Annexes, "established practices" for the assessment of mast steps/pillars or chainplates

NOTE 1 Other engineering methods can be used provided the design loads and design stresses are used.

This document is applicable to craft with a hull length L up to 24 m but it can also be applied to craft up

to 24 m load line length.

NOTE 2 The load line length is defined in the OMI "International Load Lines Convention 1966/2005", it is

smaller than L . This length also sets up, at 24 m, the lower limit of several IMO conventions.

Scantlings derived from this document are primarily intended to apply to recreational craft, including

charter vessels.

This document is not applicable to racing craft designed only for professional racing.

This document only considers the loads exerted when sailing. Any loads that may result from other

situations are not considered in this document.

Throughout this document, and unless otherwise specified, dimensions are in (m), areas in (m ), masses

2 2

in (kg), forces in (N), moments in (N m), stresses and elastic modulus in N/mm (1 N / mm = 1 Mpa).

Unless otherwise stated, the craft is assessed in fully loaded ready for use condition.

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.

ISO 12215-5:2019, Small craft — Hull construction and scantlings — Part 5: Design pressures for monohulls,

design stresses, scantlings determination
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/
© ISO 2020 – All rights reserved 1
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(E)
3.1
design categories

description of the sea and wind conditions for which a craft is assessed to be suitable

Note 1 to entry: The design categories are defined in ISO 12217 (all parts).

Note 2 to entry: The definitions of the design categories are in line with the European Recreational Craft Directive

2013/53/EU.
[SOURCE: ISO 12215-5:2019, 3.1]
3.2
loaded displacement
LDC

mass of water displaced by the craft, including all appendages, when in the fully loaded ready-for-use

condition

Note 1 to entry: The fully loaded ready-for-use condition is further defined in ISO 8666.

[SOURCE: ISO 12215-5:2019, 3.2]
3.3
sailing craft
craft for which the primary means of propulsion is wind power
Note 1 to entry: It is further defined in ISO 8666.
[SOURCE: ISO 12215-5:2019, 3.3, modified — Note 2 to entry deleted.]
3.4
monohull
craft with only one hull
3.5
multihull

craft with two or more hulls with a connecting wet deck/platform or beams above the loaded waterline,

as opposed to a tunnel boat or scow
3.6
mast step

element fitted at the bottom of the mast that supports the mast compression and transmits it to the rest

of the structure
3.7
mast pillar
pillar

in a deck stepped rig, structural element that transmits the mast compression to the rest of the

structure
3.8
chainplate
rig attachment

component(s) to which the rig elements are attached, transmitting their load to the rest of the structure,

including tie rods where relevant
EXAMPLE Metal chainplate, strapped composite chainplate,
Note 1 to entry: See Annex D.
2 © ISO 2020 – All rights reserved
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SIST EN ISO 12215-10:2021
ISO 12215-10:2020(E)
3.9
connection

all elements or group of elements connecting the rig

attachment to the structure of the craft
EXAMPLE Bolts, lamination.
Note 1 to entry: Some of these elements can be part of the chainplate.
3.10
m condition
LDC
maximum load condition corresponding to the loaded displacement (3.2)
4 Symbols

Unless specified otherwise, the symbols, factors and parameters given in Table 1 apply.

Table 1 — Symbols, factors, parameters
Symbol Unit Designation/Meaning of symbol Reference
1 - Main dimensions of the craft
Beam between centers of buoyancy: between center of buoyancy of

B m hulls, for catamarans; and between C of center hull and C of float, for Table 5, Fig 3

CB B B
trimarans
B m Beam between chainplates (from port to starboard) Table C.1, Fig 3
B m Beam of hull It 1 of Table 5
GZ m Righting lever at 30° heel for monohulls Table 5
L m Length of waterline in m condition 7.5, Table 10
WL LDC
V m Height of craft center of gravity above T bottom Table 5, Fig 3
CG C
m kg Loaded displacement mass (3.2) or condition (3.10) 3.2, Clause 13
LDC
n 1 Number of persons hiking It 1 of Table 5
T m Draught of canoe body Table 5, Fig 3
2 - Main dimensions of the rig and connected data
A m Sail area, index i defining the sail name or combination Tables 5 to 8 etc.

F N Aerodynamic force, index i defining which force it corresponds to Tables 5 to 8

F N Design compression force on single mast step/pillar 8.4. Annex C
DMC
Design compression force on mast step/pillar of two-masted rig where
F N 8.4. Annex C
DMCi
index i = 1 or 2
M Nm Design moment under sail Tables 5 and 6
M Nm Heeling moment, where index i = , , Tables 5 and 6
Hi UP MAX, BROACH,DOWN
M Nm Righting moment, where index i = , ϕ , Table 5
Ri UP UP MAX
Design apparent wind speed, in knots, at the center of area of sails,
V knots Tables 5 and 7
ACEK i
where index i stands for sail configuration S
Design apparent wind speed, in m/s, at the center of area of sails
...