oSIST prEN ISO 12217-1:2021

Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing boats of hull length greater than or equal to 6 m (ISO/FDIS 12217-1:2020)

This document specifies methods for evaluating the stability and buoyancy of intact (i.e. undamaged) boats. The flotation characteristics of boats susceptible to swamping are also encompassed.
The evaluation of stability and buoyancy properties using this document will enable the boat to be assigned to a design category (A, B, C or D) appropriate to its design and maximum total load.
This document is principally applicable to boats propelled by human or mechanical power of 6 m up to 24 m hull length. However, it can also be applied to boats of under 6 m if they do not attain the desired design category specified in ISO 12217‑3 and they are decked and have quick-draining recesses which comply with ISO 11812.
In relation to habitable multihulls, this document includes assessment of susceptibility to inversion, definition of viable means of escape and requirements for inverted flotation.
This document excludes:
—    inflatable and rigid-inflatable boats covered by the ISO 6185 series, except for references made in the ISO 6185 series to specific clauses of the ISO 12217 series;
—    personal watercraft covered by ISO 13590 and other similar powered craft;
—    gondolas and pedalos;
—    sailing surfboards;
—    surfboards, including powered surfboards;
—    hydrofoils and hovercraft when not operating in the displacement mode; and
—    submersibles.
NOTE       Displacement mode means that the boat is only supported by hydrostatic forces.
It does not include or evaluate the effects on stability of towing, fishing, dredging or lifting operations, which need to be separately considered if appropriate.

Kleine Wasserfahrzeuge - Stabilitäts- und Auftriebsbewertung und Kategorisierung - Teil 1: Nicht-Segelboote ab 6 m Rumpflänge (ISO/FDIS 12217-1:2020)

Dieses Dokument legt Verfahren für die Beurteilung von Stabilität und Auftrieb von intakten (d. h. unbeschädigten) Booten fest. Ebenfalls sind darin die Auftriebseigenschaften solcher Boote erfasst, die anfällig gegen Vollschlagen sind.
Die Beurteilung der Stabilitäts- und Auftriebseigenschaften nach diesem Dokument erlaubt es, dem Boot eine Entwurfskategorie (A, B, C, oder D) zuzuordnen, die seiner Auslegung und seiner maximalen Beladung entspricht.
Dieses Dokument ist grundsätzlich auf Boote in einem Bereich von 6 m bis 24 m Rumpflänge, die durch Muskelkraft oder Motor angetrieben werden, anwendbar. Er kann jedoch auch auf Boote von weniger als 6 m Rumpflänge angewendet werden, wenn diese bei Anwendung von ISO 12217 3 nicht die gewünschte Entwurfskategorie erreichen, jedoch voll gedeckt sind und schnell-lenzende Rezesse entsprechend ISO 11812 besitzen.
In Bezug auf bewohnbare Mehrrumpfboote beinhaltet dieses Dokument die Bewertung der Anfälligkeit gegen Kenterung, die Definition funktionsfähiger Fluchtmöglichkeiten und Anforderungen an die Schwimm¬fähigkeit im gekenterten Zustand (kieloben).
Ausgeschlossen von der Anwendung dieses Dokuments sind:
—   Schlauchboote und Schlauchboote mit festem Rumpf (RIB) nach ISO 6185 mit Ausnahme der Verweisungen, die sich in ISO 6185 auf bestimmte Abschnitte in ISO 12217 beziehen;
—   Wassermotorräder nach ISO 13590 und andere, ähnlich angetriebene Wasserfahrzeuge;
—   Gondeln und Tretboote;
—   Segel-Surfbretter;
—   Surfbretter, einschließlich motorisierte Surfbretter;
—   Tragflügelboote und Luftkissenfahrzeuge, sofern sie nicht im Verdrängermodus betrieben werden;
—   Tauchfahrzeuge.
ANMERKUNG   Verdrängermodus bedeutet, dass das Boot nur durch hydrostatische Kräfte getragen wird.
Dieses Dokument enthält keine Angaben oder Beurteilungen zu den die Stabilität betreffenden Auswirkungen von Schleppen, Fischen, Baggern oder Kranarbeiten; diese müssen, falls erforderlich, gesondert berücksichtigt werden.

Petits navires - Évaluation et catégorisation de la stabilité et de la flottabilité - Partie 1: Bateaux à propulsion non vélique d'une longueur de coque supérieure ou égale à 6 m (ISO/FDIS 12217-1:2020)

Le présent document spécifie les méthodes d'évaluation de la stabilité et de la flottabilité des bateaux à l'état intact (c'est-à-dire non endommagés). Les caractéristiques de flottabilité des bateaux susceptibles d'envahissement sont également prises en compte.
L'évaluation des propriétés de stabilité et de flottabilité effectuée en utilisant le présent document permettra d'attribuer à un bateau une catégorie de conception (A, B, C ou D) appropriée à sa conception et à sa charge maximale.
Le présent document est principalement applicable aux bateaux propulsés par l'énergie humaine ou mécanique, d'une longueur de coque comprise entre 6 m et 24 m. Elle peut, cependant, être également appliquée aux bateaux de moins de 6 m, s'ils n'atteignent pas la catégorie de conception désirée en appliquant l'ISO 12217-3, et s'ils sont pontés et munis de cavités rapidement autovideuses conformes à l'ISO 11812.
Pour ce qui concerne les multicoques habitables, le présent document comprend l'évaluation de la susceptibilité à l'inversion, la définition d'un moyen d'échappée viable et les exigences de flottabilité à l'état inversé.
Le présent document exclut:
—    les bateaux pneumatiques et semi-rigides couverts par la série ISO 6185, excepté lorsque la série ISO 6185 fait référence à des paragraphes spécifiques de la série ISO 12217;
—    les véhicules nautiques à moteur (motos aquatiques), couverts par l'ISO 13590 et engins à moteur similaires;
—    les gondoles et pédalos;
—    les planches à voiles;
—    les planches de surf, y compris les planches de surf motorisées;
—    les hydrofoils et les bateaux à coussins d'air (hovercraft) lorsqu'ils ne fonctionnent pas en mode à déplacement; et
—    les submersibles.
NOTE            Le mode à déplacement signifie que le bateau est uniquement supporté par des forces hydrostatiques.
Il n'inclut ni n'évalue les effets sur la stabilité provenant du remorquage, de la pêche, du dragage ou d'opérations de levage, qui doivent être, si nécessaire, considérés séparément.

Mala plovila - Stabilnost in ocena vzgona ter kategorizacija - 1. del: Čolni razen jadrnic s trupom, večjim ali enakim 6 m (ISO/FDIS 12217-1:2020)

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Jan-2021
• ICS: 47.080 - Small craft
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 26-Nov-2020
• Due Date: 15-Apr-2021
• Completion Date: 01-Feb-2021
• 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: prEN ISO 12217-1 - Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing boats of hull length greater than or equal to 6 m (ISO/DIS 12217-1:2020)

Relations

• Revised: SIST EN ISO 12217-1:2017 - Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing boats of hull length greater than or equal to 6 m (ISO 12217-1:2015)
• Effective Date: 21-Aug-2019
• Revised: SIST EN ISO 12217-1:2017 - Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing boats of hull length greater than or equal to 6 m (ISO 12217-1:2015)
• Effective Date: 18-Jan-2023
• Revised: SIST EN ISO 12217-1:2017 - Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing boats of hull length greater than or equal to 6 m (ISO 12217-1:2015)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 12217-1:2021
01-januar-2021
Mala plovila - Stabilnost in ocena vzgona ter kategorizacija - 1. del: Čolni razen
jadrnic s trupom, večjim ali enakim 6 m (ISO/FDIS 12217-1:2020)
Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing
boats of hull length greater than or equal to 6 m (ISO/FDIS 12217-1:2020)
Kleine Wasserfahrzeuge - Stabilitäts- und Auftriebsbewertung und Kategorisierung - Teil
1: Nicht-Segelboote ab 6 m Rumpflänge (ISO/FDIS 12217-1:2020)
Petits navires - Évaluation et catégorisation de la stabilité et de la flottabilité - Partie 1:
Bateaux à propulsion non vélique d'une longueur de coque supérieure ou égale à 6 m
(ISO/FDIS 12217-1:2020)
Ta slovenski standard je istoveten z: prEN ISO 12217-1
ICS:
47.080 Čolni Small craft
oSIST prEN ISO 12217-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 12217-1:2021

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oSIST prEN ISO 12217-1:2021
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 12217-1
ISO/TC 188
Small craft — Stability and buoyancy
Secretariat: SIS
assessment and categorization —
Voting begins on:
2020-11-20
Part 1:
Voting terminates on:
Non-sailing boats of hull length
2021-02-12
greater than or equal to 6 m
Petits navires — Évaluation et catégorisation de la stabilité et de la
flottabilité —
Partie 1: Bateaux à propulsion non vélique d'une longueur de coque
supérieure ou égale à 6 m
ISO/CEN PARALLEL PROCESSING
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 12217-1:2020(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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oSIST prEN ISO 12217-1:2021
ISO/FDIS 12217-1:2020(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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oSIST prEN ISO 12217-1:2021
ISO/FDIS 12217-1:2020(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
3.1 Primary . 3
3.2 Downflooding . 5
3.3 Dimensions, areas and angles . 5
3.4 Condition, mass and volume . 7
3.5 Other terms and definitions . 9
4 Symbols .12
5 Procedure.13
5.1 Maximum load .13
5.2 Sailing or non-sailing .13
5.3 Tests and calculations to be applied .13
5.4 Variation in input parameters . .14
6 Tests, calculations and requirements .15
6.1 Downflooding .15
6.1.1 Downflooding openings .15
6.1.2 Downflooding height .17
6.1.3 Downflooding angle .19
6.2 Offset-load test .20
6.2.1 Objective . .20
6.2.2 Test .20
6.2.3 Requirements .20
6.3 Resistance to waves and wind .21
6.3.1 General.21
6.3.2 Rolling in beam waves and wind .21
6.3.3 Resistance to waves .22
6.4 Heel due to wind action .22
6.4.1 General.22
6.4.2 Calculation .23
6.4.3 Requirement .23
6.5 Recess size .23
6.5.1 Application .23
6.5.2 Simplified methods .24
6.5.3 Direct calculation method .25
6.5.4 Design category C boats using option 6 .26
6.6 Habitable multihull boats .26
6.7 Motor sailers .26
6.7.1 General.26
6.7.2 Requirement .27
6.8 Flotation requirements .27
6.9 Detection and removal of water .27
7 Application .28
7.1 Deciding the design category .28
7.2 Meaning of the design categories.28
Annex A (normative) Full method for required downflooding height .30
Annex B (normative) Method for offset-load test .32
Annex C (normative) Methods for calculating downflooding angle .40
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oSIST prEN ISO 12217-1:2021
ISO/FDIS 12217-1:2020(E)

Annex D (normative) Method for measuring freeboard margin .42
Annex E (normative) Determining the curve of righting moments .44
Annex F (normative) Method for level flotation test .47
Annex G (normative) Flotation material and elements .52
Annex H (normative) Information for owner's manual .54
Annex I (informative) Summary of requirements .56
Annex J (informative) Worksheets .58
Annex K (informative) Illustration of recess retention level .75
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered .76
Bibliography .78
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oSIST prEN ISO 12217-1:2021
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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 Technical Committee ISO/TC 188, Small craft, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 464, Small craft, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This fourth edition of ISO 12217-1 cancels and replaces the third edition (ISO 12217-1:2015), of which it
constitutes a minor revision. The changes compared to the previous edition are as follows:
— all normative references have been updated and dated;
— the “allowance for the maximum mass of optional equipment and fittings not included in the
manufacturer’s basic outfit” has been moved from 3.4.4 (maximum load) to 3.4.5 (maximum load
condition);
— in Annex J, the calculation worksheet No. 1 has been corrected to reflect the above;
— minor editorial changes throughout the document.
A list of all parts in the ISO 12217 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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oSIST prEN ISO 12217-1:2021
ISO/FDIS 12217-1:2020(E)

Introduction
This document enables the determination of the limiting environmental conditions for which an
individual boat has been designed.
It enables the boat to be assigned to a design category appropriate to its design and maximum load.
The design categories used align with those in the Recreational Craft Directive of the European Union,
EU Directive 2013/53/EU.
The design category given in respect of stability and buoyancy is that for which the boat satisfies all the
requirements according to 5.3, as summarized in Annex I.
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oSIST prEN ISO 12217-1:2021
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 12217-1:2020(E)
Small craft — Stability and buoyancy assessment and
categorization —
Part 1:
Non-sailing boats of hull length greater than or equal to 6 m
CAUTION — Compliance with this document does not guarantee total safety or total freedom of
risk from capsize or sinking.
IMPORTANT — The electronic file of this document contains colours which are considered to be
useful for the correct understanding of the document. Users should therefore consider printing
this document using a colour printer.
1 Scope
This document specifies methods for evaluating the stability and buoyancy of intact (i.e. undamaged)
boats. The flotation characteristics of boats susceptible to swamping are also encompassed.
The evaluation of stability and buoyancy properties using this document will enable the boat to be
assigned to a design category (A, B, C or D) appropriate to its design and maximum total load.
This document is principally applicable to boats propelled by human or mechanical power of 6 m up to
24 m hull length. However, it can also be applied to boats of under 6 m if they do not attain the desired
design category specified in ISO 12217-3 and they are decked and have quick-draining recesses which
comply with ISO 11812.
In relation to habitable multihulls, this document includes assessment of susceptibility to inversion,
definition of viable means of escape and requirements for inverted flotation.
This document excludes:
— inflatable and rigid-inflatable boats covered by ISO 6185, except for references made in ISO 6185 to
specific clauses of ISO 12217;
— personal watercraft covered by ISO 13590 and other similar powered craft;
— gondolas and pedalos;
— sailing surfboards;
— surfboards, including powered surfboards;
— hydrofoils and hovercraft when not operating in the displacement mode; and
— submersibles.
NOTE Displacement mode means that the boat is only supported by hydrostatic forces.
It does not include or evaluate the effects on stability of towing, fishing, dredging or lifting operations,
which need to be separately considered if appropriate.
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oSIST prEN ISO 12217-1:2021
ISO/FDIS 12217-1:2020(E)

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 2896:2001, Rigid cellular plastics — Determination of water absorption
ISO 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for
safety signs and safety markings
ISO 6185-4:2011, Inflatable boats — Part 4: Boats with a hull length of between 8 m and 24 m with a motor
power rating of 15 kW and greater
ISO 8666:2020, Small craft — Principal data
1)
ISO 9093:— , Small craft — Seacocks and through-hull fittings
ISO 10240:2019, Small craft — Owner's manual
ISO 11812:2020, Small craft — Watertight or quick-draining recesses and cockpits
ISO 12216:2020, Small craft — Windows, portlights, hatches, deadlights and doors — Strength and
watertightness requirements
2)
ISO 12217-2:— , Small craft — Stability and buoyancy assessment and categorization — Part 2: Sailing
boats of hull length greater than or equal to 6 m
3)
ISO 12217-3:— , Small craft — Stability and buoyancy assessment and categorization — Part 3: Boats of
hull length less than 6 m
4)
ISO 14946:— , Small craft — Maximum load capacity
ISO 15083:2020, Small craft — Bilge-pumping systems
ISO 15085:2003+Amd 2:2017, Small craft — Man-overboard prevention and recovery
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE The meanings of certain symbols used in the definitions are given in Clause 4.
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/
1) Under preparation, revision of ISO 9093-1:1994 and ISO 9093-2:2002. Stage at the time of publication of this
FDIS: ISO/FDIS 9093:2020. At publication of ISO 12217-1, the publication date of ISO 9093 will be updated and this
footnote removed.
2) Under preparation, revision of ISO 12217-2:2015. Stage at the time of publication of this FDIS:
ISO/FDIS 12217-2:2020. At publication of ISO 12217-1, the publication date of ISO 12217-2 will be updated and
this footnote removed.
3) Under preparation, revision of ISO 12217-3:2015. Stage at the time of publication of this FDIS:
ISO/FDIS 12217-3:2020. At publication of ISO 12217-1, the publication date of ISO 12217-3 will be updated and
this footnote removed.
4) Under preparation, revision of ISO 14946:2001. Stage at the time of publication of this FDIS:
ISO/FDIS 14946.2:2020. At publication of ISO 12217-1, the publication date of ISO 14946 will be updated and this
footnote removed.
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oSIST prEN ISO 12217-1:2021
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3.1 Primary
3.1.1
design category
description of the sea and wind conditions for which a boat is assessed to be suitable
Note 1 to entry: See also 7.2.
3.1.2
non-sailing boat
boat for which the primary means of propulsion is other than by wind power, having reference sail area
2/3
(3.3.8) A < 0,07(m ) , where m is the mass of the boat in the maximum load condition, expressed
S LDC LDC
in kilograms
3.1.3
recess
volume open to the air that might retain water within the range of loading conditions and
corresponding trims
EXAMPLE Cockpits, wells, open volumes or areas bounded by bulwarks or coamings.
Note 1 to entry: Cabins, shelters or lockers provided with closures according to the requirements of ISO 12216
are not recesses.
Note 2 to entry: Cockpits that are open aft to the sea are considered to be recesses. Flush decks without bulwarks
or coamings are not recesses.
3.1.4
quick-draining recess
recess fulfilling all the requirements of ISO 11812 for “quick-draining cockpits and recesses”
Note 1 to entry: According to its characteristics, a cockpit may be considered to be quick-draining for one design
category, but not for a higher category.
3.1.5
watertight recess
recess fulfilling all the requirements of ISO 11812 for “watertight cockpits and recesses”
Note 1 to entry: This term only implies requirements in respect of watertightness and sill heights, but not those
for drainage.
3.1.6
fully enclosed boat
boat in which the horizontal projection of the sheerline area comprises any combination of
— watertight deck and superstructure, and/or
— quick-draining recesses complying with ISO 11812, and/or
— watertight recesses complying with ISO 11812 with a combined volume of less than (L B
H H
F )/40, and
M
all closing appliances have their degree of watertightness in accordance with ISO 12216
Note 1 to entry: The size of recesses permitted for boats of design category A, B or some boats of design category
C is restricted by the requirements of 6.5.
3.1.7
partially protected boat
boat which does not fulfil the definition of a fully-enclosed boat and in which the plan projected area of
decking, cabins, shelters, outboard engine wells or other rigid covers which are watertight from above
according to ISO 12216 and which immediately shed water directly overboard (i.e. not via drains) and
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oSIST prEN ISO 12217-1:2021
ISO/FDIS 12217-1:2020(E)

— comprises at least one-third of the plan projected area of the sheerline, and
— includes all the area within L /3 from the bow, and
H
— includes at least 100 mm inboard from the sheerline,
except that the area of any watertight recesses with a total volume of less than (L B F )/40 might
H H M
shed water via drains
Note 1 to entry: This is illustrated in Figure 1.
Note 2 to entry: Outboard engine wells are considered to provide a covering suitable for this purpose.
Dimensions in millimetres
Key
1 recess area open from above (less than two-thirds of total sheerline area)
2 sheerline
3 open shelter or enclosed cabin
Figure 1 — Partially protected boat
3.1.8
habitable boat
boat having a fully enclosed cabin with rigid roof fitted with one or more bunks, benches,
pipecots, hammocks or similar locations that can be used for sleeping when the boat is under way
Note 1 to entry: A boat is considered to be “habitable” if a fabric closure is used instead of a rigid door, or the
cabin has fabric sides.
Note 2 to entry: The following are not considered to render a boat “habitable”:
— a cockpit tent, or
— an open-sided cuddy intended to provide limited protection from spray, provided it is not fitted with fabric
closures all round.
Note 3 to entry: Locations used for sleeping have minimum dimensions of 1,5 m diagonal length, 0,4 m width
at the widest point, and with a minimum headroom of 0,4 m over the length. The cabin sole and compartments
designated by the builder to be used exclusively for storage and referenced in the owner’s manual are not
included.
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oSIST prEN ISO 12217-1:2021
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3.2 Downflooding
3.2.1
downflooding opening
opening in the hull or deck (including the edge of a recess) that might admit water into the interior or
bilge of a boat, or a recess, apart from those excluded in 6.1.1.6
3.2.2
downflooding angle
ϕ
D
angle of heel at which downflooding openings (apart from those excluded in 6.1.1.6) become immersed,
when the boat is in calm water and in the appropriate loading condition at design trim
Note 1 to entry: Where openings are not symmetrical about the centreline of the boat, the case resulting in the
smallest angle is used.
Note 2 to entry: The following are specifically considered:
— ϕ is the downflooding angle to any downflooding opening
D
— ϕ is the angle of heel at which openings which are not marked “KEEP SHUT WHEN UNDER WAY” having
DA
2
a combined total area, expressed in square centimetres (cm ), greater than the number represented by
1,2L B F first become immersed;
H H M
Note 3 to entry: Downflooding angle is expressed in degrees.
3.2.3
downflooding height
h
D
smallest height above the waterline to any downflooding opening, apart from those excluded in 6.1.1.6,
when the boat is upright in calm water and in the maximum load condition, measured to the critical
downflooding point which might be within pipes or ducts inside the hull
Note 1 to entry: Downflooding height is expressed in metres.
Note 2 to entry: See Figure D.1 c).
3.3 Dimensions, areas and angles
3.3.1
length of hull
L
H
length of the hull measured according to ISO 8666
Note 1 to entry: Length of hull is expressed in metres.
3.3.2
length waterline
L
WL
waterline length measured according to ISO 8666 when the boat is upright in calm water, in the
appropriate loading condition and at design trim
Note 1 to entry: For multihull boats, L relates to that of the longest individual hull.
WL
Note 2 to entry: Length waterline is expre
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