EN ISO 12217-2:2013

SLOVENSKI STANDARD
01-maj-2013
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SIST EN ISO 12217-2:2002
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WUXSRPYHþMLPDOLHQDNLPP,62
Small craft - Stability and buoyancy assessment and categorization - Part 2: Sailing
boats of hull length greater than or equal to 6 m (ISO 12217-2:2013)
Kleine Wasserfahrzeuge - Stabilitäts- und Auftriebsbewertung und Kategorisierung - Teil
2: Segelboote ab 6 m Rumpflänge (ISO 12217-2:2013)
Petits navires - Évaluation et catégorisation de la stabilité et de la flottabilité - Partie 2:
Bateaux à voiles d'une longueur de coque supérieure ou égale à 6 m (ISO 12217-
2:2013)
Ta slovenski standard je istoveten z: EN ISO 12217-2:2013
ICS:
47.080 ýROQL Small craft
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 12217-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2013
ICS 47.080 Supersedes EN ISO 12217-2:2002
English Version
Small craft - Stability and buoyancy assessment and
categorization - Part 2: Sailing boats of hull length greater than
or equal to 6 m (ISO 12217-2:2013)
Petits navires - Évaluation et catégorisation de la stabilité et Kleine Wasserfahrzeuge - Stabilitäts- und
de la flottabilité - Partie 2: Bateaux à voiles d'une longueur Auftriebsbewertung und Kategorisierung - Teil 2:
de coque supérieure ou égale à 6 m (ISO 12217-2:2013) Segelboote ab 6 m Rumpflänge (ISO 12217-2:2013)
This European Standard was approved by CEN on 21 December 2012.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12217-2:2013: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 94/25/EC as amended by Directive 2003/44/EC . 4

Foreword
This document (EN ISO 12217-2:2013) has been prepared by Technical Committee ISO/TC 188 "Small craft".
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 September 2013, and conflicting national standards shall be
withdrawn at the latest by September 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 12217-2:2002.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 12217-2:2013 has been approved by CEN as EN ISO 12217-2:2013 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 94/25/EC as amended by Directive
2003/44/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission to
provide one means of conforming to Essential Requirements of the New Approach Directive 94/25/EC as
amended by Directive 2003/44/EC.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one member state, compliance with the normative clauses of
this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of
conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and EU Directives
Corresponding
Clauses/sub-clauses of this annexes/paragraphs of
Comments
European Standard Directive 94/25/EC as amended
by 2003/44/EC
Design categories A, B, C and D
Annex IA, Clause 3.2, Stability
defined in the standard are
and Freeboard, Clause 3.5,
considered to correspond to
5, 6, 7, Annex A, B, C, D Flooding, and Clauses 3.6 and
design categories A, B, C and D
3.2, maximum recommended
of Directive 94/25/EC as
load.
amended by 2003/44/EC.
Annex IA2, Clause 3.3, Buoyancy
6.9, 7.12, Annex D, E
and flotation.
7.13 Annex IA2, Clause 3.8, Escape
Annex IA2, Clause 2.5, Owner’s
Annex F
manual
WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling
within scope of this standard.

INTERNATIONAL ISO
STANDARD 12217-2
Second edition
2013-03-01
Small craft — Stability and buoyancy
assessment and categorization —
Part 2:
Sailing boats of hull length greater than
or equal to 6 m
Petits navires — Évaluation et catégorisation de la stabilité et de la
flottabilité —
Partie 2: Bateaux à voiles d’une longueur de coque supérieure ou égale
à 6 m
Reference number
ISO 12217-2:2013(E)
©
ISO 2013
ISO 12217-2:2013(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 12217-2:2013(E)
Contents Page
Foreword . v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Primary . 2
3.2 Hazards . 4
3.3 Downflooding . 4
3.4 Dimensions, areas and angles . 5
3.5 Condition, mass and volume . 6
3.6 Other terms and definitions . 9
4 Symbols . 11
5 Procedure .13
5.1 Maximum load .13
5.2 Sailing or non-sailing .13
5.3 Tests, calculations and requirements to be applied .13
5.4 Variation in input parameters .13
6 Requirements for monohull boats .13
6.1 Requirements to be applied .13
6.2 Downflooding .14
6.3 Recess size .18
6.4 Minimum righting energy .21
6.5 Angle of vanishing stability .21
6.6 Stability index (STIX) .23
6.7 Knockdown-recovery test .26
6.8 Wind stiffness test .27
6.9 Flotation requirements .30
6.10 Capsize-recovery test .30
6.11 Detection and removal of water .32
7 Requirements for catamarans, trimarans and form-stable monohulls .33
7.1 Requirements to be applied .33
7.2 Downflooding openings .33
7.3 Downflooding height .33
7.4 Recess size .33
7.5 Stability information .33
7.6 Safety signs .34
7.7 Bare poles factor .35
7.8 Rolling in breaking waves .35
7.9 Pitchpoling .36
7.10 Diagonal stability .36
7.11 Habitable multihull boats .36
7.12 Buoyancy when inverted .38
7.13 Escape after inversion .38
8 Safety signs .39
9 Application .40
9.1 Deciding the design category .40
9.2 Meaning of the design categories .40
Annex A (normative) Full method for required downflooding height.42
Annex B (normative) Methods for calculating downflooding angle .44
Annex C (normative) Determining the curve of righting moments .47
ISO 12217-2:2013(E)
Annex D (normative) Method for calculating reserve of buoyancy after inversion or swamping .50
Annex E (normative) Flotation material and elements .52
Annex F (normative) Information for owner’s manual .54
Annex G (normative) Determination of safe wind speed information .58
Annex H (normative) Determination of longitudinal righting characteristics .61
Annex I (informative) Summary of requirements .64
Annex J (informative) Worksheets .67
Bibliography .86
iv © ISO 2013 – All rights reserved

ISO 12217-2:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 12217-2 was prepared by Technical Committee ISO/TC 188, Small craft.
This second edition cancels and replaces the first edition (ISO 12217-2:2002), which has been technically revised.
ISO 12217 consists of the following parts, under the general title Small craft — Stability and buoyancy
assessment and categorization:
— Part 1: Non-sailing boats of hull length greater than or equal to 6 m
— Part 2: Sailing boats of hull length greater than or equal to 6 m
— Part 3: Boats of hull length less than 6 m
ISO 12217-2:2013(E)
Introduction
This part of ISO 12217 enables the determination of 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
94/25/EC as amended by Directive 2003/44/EC.
Annex J provides worksheets to assist in the systematic assessment of a boat according to this part of ISO 12217.
vi © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 12217-2:2013(E)
Small craft — Stability and buoyancy assessment and
categorization —
Part 2:
Sailing boats of hull length greater than or equal to 6 m
CAUTION — Compliance with this part of ISO 12217 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 part of ISO 12217 specifies methods for evaluating the stability and buoyancy of intact (i.e. undamaged)
boats. The flotation characteristics of boats vulnerable to swamping are also encompassed.
The evaluation of stability and buoyancy properties using this part of ISO 12217 will enable the boat to be
assigned to a design category (A, B, C or D) appropriate to its design and maximum load.
This part of ISO 12217 is principally applicable to boats propelled primarily by sail (even if fitted with an auxiliary
engine) of 6 m up to and including 24 m hull length. However, it can also be applied to boats less than 6 m if
they are habitable multihulls or may be applied 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 part of ISO 12217 includes assessment of vulnerability to inversion,
definition of viable means of escape and requirements for inverted flotation.
This part of ISO 12217 excludes:
— inflatable and rigid-inflatable boats covered by ISO 6185, except for references made in ISO 6185 to
specific clauses of ISO 12217;
— gondolas and pedalos;
— surfboards including sailing surfboards; and
— hydrofoils and foil stabilized boats when not operating in the displacement mode.
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.
2 Normative references
The following referenced documents are indispensable for the application 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, Graphical symbols – Safety colours and safety signs – Part 1: Design principles for safety signs
and safety markings
ISO 12217-2:2013(E)
ISO 8666, Small craft — Principal data
ISO 9093-1, Small craft — Seacocks and through-hull fittings — Part 1: Metallic
ISO 9093-2, Small craft — Seacocks and through-hull fittings — Part 2: Non-metallic
ISO 9094 (all parts), Small craft — Fire protection
ISO 10240, Small craft — Owner’s manual
ISO 11812, Small craft — Watertight cockpits and quick-draining cockpitsI
ISO 12216, Small craft — Windows, portlights, hatches, deadlights and doors — Strength and watertightness
requirements
ISO 12217-1:2013, Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-sailing
boats of hull length greater than or equal to 6 m
ISO 12217-3:2013, Small craft — Stability and buoyancy assessment and categorization — Part 3: Boats of
hull length less than 6 m
ISO 14946, Small craft — Maximum load capacity
ISO 15083, Small craft — Bilge-pumping systems
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.
3.1 Primary
3.1.1
design category
description of the sea and wind conditions for which a boat is assessed to be suitable by this part of ISO 12217
NOTE See also 9.2.
3.1.2
sailing boat
boat for which the primary means of propulsion is by wind power, having reference sail area (3.4.8)
2/3
A ≥ 0,07(m )
S LDC
NOTE m is the mass of the boat in the maximum load condition, expressed in kilograms.
LDC
3.1.3
catamaran
boat with two main load-bearing hulls
EXAMPLE Boats with a centreline or bridge-deck nacelle which supports less than 30 % of the mass in the maximum
load condition are considered to be catamarans. Proas are asymmetric catamarans.
3.1.4
trimaran
boat with a centre main hull and two sidehulls in which the centre hull, when the boat is upright, supports 30 %
or more of the mass in the maximum load condition
3.1.5
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.
2 © ISO 2013 – All rights reserved

ISO 12217-2:2013(E)
NOTE 1 Cabins, shelters or lockers provided with closures according to the requirements of ISO 12216 are not recesses.
NOTE 2 Cockpits that are open aft to the sea are considered to be recesses. Flush decks without bulwarks or coamings
are not recesses.
3.1.6
quick-draining recess
recess fulfilling all the requirements of ISO 11812 for “quick-draining cockpits and recesses”
NOTE 1 According to its characteristics, a cockpit may be considered to be quick-draining for one design category, but
not for a higher category.
NOTE 2 ISO 11812 contains requirements with which most sailing dinghies cannot comply.
3.1.7
watertight recess
recess fulfilling all the requirements of ISO 11812 for “watertight cockpits and recesses”
NOTE This term only implies requirements in respect of watertightness and sill heights, but not those for drainage.
3.1.8
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 which comply with ISO 11812, and/or
— watertight recesses complying with ISO 11812 with a combined volume of less than (L B F )/40, and
H H M
all closing appliances have their degree of watertightness in accordance with ISO 12216
NOTE 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 6.3.
3.1.9
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 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 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 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.
3.1.10
habitable part of a boat
spaces within a habitable boat with rigid roof that are fitted with a toilet or in which there is provision for any of
the following activities: sitting, sleeping, cooking, eating, washing, navigation, steering
NOTE Compartments designated by the builder to be used exclusively for storage and referenced in the owner’s
manual are not included.
ISO 12217-2:2013(E)
3.2 Hazards
3.2.1
capsize
event when a boat reaches any heel angle from which it is unable to recover to equilibrium near the upright
without intervention
3.2.2
knockdown
event when a boat reaches a heel angle sufficient to immerse the masthead, and from which it may or may not
recover without intervention
3.2.3
inversion
event when a boat becomes upside down
3.3 Downflooding
3.3.1
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 6.2.1.6
3.3.2
downflooding angle
f
D
angle of heel at which downflooding openings (apart from those excluded in 6.2.1.6) become immersed, when
the boat is in calm water and in the appropriate loading condition at design trim
NOTE 1 Where openings are not symmetrical about the centreline of the boat, the case resulting in the smallest
angle is used.
NOTE 2 The following are specifically considered:
— f is the downflooding angle to any downflooding opening
D
— f is the angle of heel at which openings which are not marked “KEEP SHUT WHEN UNDER WAY” having a
DA
combined total area, expressed in square centimetres (cm ), greater than the number represented by 1,2L B F first
H H M
become immersed;
— f is the downflooding angle at which recesses which are not quick-draining begin to fill with water;
DC
— f is the downflooding angle at which any main access hatch (i.e. having an opening area greater than 0,18 m each)
DH
giving direct access to the main open air helm position first begins to become immersed.
NOTE 3 Downflooding angle is expressed in degrees.
3.3.3
downflooding height
h
D
smallest height above the waterline to any downflooding opening, apart from those excluded in 6.2.1.6, 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 Downflooding height is expressed in metres.
NOTE 2 See Figure B.1
4 © ISO 2013 – All rights reserved

ISO 12217-2:2013(E)
3.4 Dimensions, areas and angles
3.4.1
length of hull
L
H
length of the hull measured according to ISO 8666
NOTE Length of hull is expressed in metres.
3.4.2
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 For multihull boats, L relates to that of the longest individual hull.
WL
NOTE 2 Length waterline is expressed in metres.
3.4.3
beam of hull
B
H
maximum beam of the hull using the method of ISO 8666; for catamaran and trimaran boats, maximum beam
across the outer hulls
NOTE Beam of hull is expressed in metres.
3.4.4
beam waterline
B
WL
greatest beam measured according to ISO 8666 at the waterline in calm water which, for multihull boats, is the
sum of the maximum waterline beams of each of the hulls, the boat being upright, in the appropriate loading
condition and at design trim
NOTE Beam waterline is expressed in metres.
3.4.5
beam between hull centres
B
CB
on catamaran and trimaran boats, the transverse distance between the centres of buoyancy of the outer hulls
NOTE Beam between hull centres is expressed in metres.
3.4.6
freeboard amidships
F
M
distance of the sheerline or deck above the waterline at L /2 measured according to ISO 8666, the boat being
WL
upright, in the appropriate loading condition and at design trim
NOTE 1 Freeboard amidships is expressed in metres.
NOTE 2 Where no loading condition is specified, maximum load condition should be assumed.
3.4.7
draught of canoe body
T
C
draught of the main buoyant part of the hull(s) below the waterline, as defined in ISO 8666, the boat being
upright in the appropriate loading condition and at design trim
NOTE Draught of canoe body excludes appendages such as rudders or skegs, and is expressed in metres.
ISO 12217-2:2013(E)
3.4.8
reference sail area
A
S
actual profile area of sails set abaft a mast, plus the maximum profile areas of all masts, plus reference triangle
area(s) forward of each mast as defined in ISO 8666
NOTE Sail area is expressed in square metres.
3.4.9
standard sail area
A′
S
actual profile area of the largest sail plan suitable for windward sailing in true winds of 10–12 kn (5,1–6,2 m/s),
including overlaps, and supplied or recommended by the builder as standard
NOTE Sail area is expressed in square metres.
3.4.10
angle of vanishing stability
f
V
angle of heel nearest the upright (other than upright) in the appropriate loading condition at which the transverse
stability righting moment is zero
NOTE 1 This is determined assuming that there is no offset load, and that all potential downflooding openings are
considered to be watertight.
NOTE 2 Where a boat has recesses which are not quick-draining, f is to be taken as the downflooding angle to these
V
recesses, unless the loss of buoyancy due to such recesses is fully accounted for in determining f .
V
NOTE 3 Angle of vanishing stability is expressed in degrees.
3.5 Condition, mass and volume
3.5.1
empty craft condition
empty boat including fittings and equipment as listed below but excluding all optional equipment and fittings not
included in the manufacturer’s basic outfit:
a) structure: comprising all the structural parts, including any fixed ballast keel and/or drop keel/centreboard/
daggerboard(s) and rudder(s);
b) ballast: any fixed ballast installed;
c) internal structure and accommodation: bulkheads and partitions, insulation, lining, built-in furniture, flotation
material, windows, hatches and doors, permanently installed mattresses and upholstery materials;
d) permanently installed engine(s) and fuel system: comprising inboard engine(s), including all supplies and
controls as needed for their operation, permanently installed fuel systems, including tanks;
e) fluids in permanently installed systems: residual working fluids as needed for their operation (see examples
below), but excluding contents of fluid ballast systems and tanks, and main storage tanks (which are
included in maximum load);
EXAMPLES: fluids in hot or cold water, fuel, lubricating or hydraulic oil systems
f) internal equipment, including:
— all items of equipment permanently attached to the craft, e.g. tanks, toilet system(s), water transfer
equipment;
— bilge pumping system(s), cooking and heating devices, cooling equipment, ventilation system(s);
— electrical installation and equipment, including permanently installed batteries mounted in the position
intended by the builder;
6 © ISO 2013 – All rights reserved

ISO 12217-2:2013(E)
— fixed navigational and electronic equipment;
— fixed fire fighting equipment, where fitted;
g) external equipment, including:
— all permanently attached standard or specified deck fittings, e.g. guardrails, pulpits and pushpits,
bowsprits and their attachments, bathing platforms, boarding ladders, steering equipment, winches,
sprayhood(s);
— awning(s), cockpit tables, gratings, signal mast(s), where fitted;
— mast(s), boom(s), spinnaker poles and other pole(s), standing and running rigging, in the stowed
position ready for use; all standing and running rigging in place
NOTE The mass in the empty craft condition is denoted by m and is expressed in kilograms.
EC
3.5.2
light craft condition
empty craft condition plus standard equipment (3.6.12) plus removable ballast (whether solid or liquid) when supplied
and/or intended by the manufacturer to be carried when the boat is afloat, with elements positioned as follows:
a) where provision is made for propulsion by outboard engine(s) of more than 3 kW, the heaviest engine(s)
recommended for the boat by the manufacturer is(are) mounted in the working position(s);
b) where batteries are fitted, they are mounted in the position intended by the builder, and if there is no
specific stowage provided for batteries, the mass of one battery for each engine over 7 kW is allowed for,
and located within 1,0 m of the engine location.
c) all upwind sails supplied or recommended by the builder as standard, onboard and rigged ready for use, but
not hoisted, e.g. mainsail on boom, roller furling sails furled, hanked foresails on stay stowed on foredeck
NOTE 1 For the minimum mass of outboard engines and batteries, refer to Tables C.1 and C.2 of ISO 12217-3:2013.
NOTE 2 The mass in the light craft condition is denoted by m and is expressed in kilograms.
LC
3.5.3
minimum operating condition
boat in the light craft condition with the following additions:
a) mass to represent the crew, positioned on the centreline near the main control position of:
— 75 kg where L ≤ 8 m,
H
— 150 kg where 8 m < L ≤ 16 m,
H
— 225 kg where 16 m < L ≤ 24 m;
H
b) non-edible stores and equipment normally carried on the boat and not included in the manufacturer’s list
of standard equipment;
EXAMPLES Loose internal equipment and tools, spare parts, dishes, kitchenware and cutlery, additional anchors or
sails, dinghy and outboard if carried aboard.
NOTE 1 Liquids in main storage tanks (e.g. fuel, drinking water, black and grey water, live wells, bait tanks, etc.) are excluded.
NOTE 2 Water ballast in tanks which are symmetrical about the centreline and which are intended by the builder to be
used for variable asymmetric ballasting while under way is excluded.
NOTE 3 Elements with transversally variable position (e.g. canting keels, movable solid ballast, tilting masts) are
positioned symmetrically about the centreline of the boat. Elements with longitudinally variable position (eg: tilting masts
or keels) are positioned so that the VCG is maximized.
NOTE 4 Any centreboard or keel is in the raised position unless it can be fixed in the lowered position and an appropriate
instruction is given in the owner’s manual.
ISO 12217-2:2013(E)
NOTE 5 The mass in the minimum operating condition is denoted by m and is expressed in kilograms.
MO
3.5.4
maximum load
load which the boat is designed to carry in addition to the light craft condition, comprising:
— the crew limit at 75 kg each;
— the personal effects of the crew;
— stores and cargo (if any), dry provisions, consumable liquids;
— contents of all permanently installed storage tanks filled to 95 % of their maximum capacity, including fuel,
drinking water, black water, grey water, lubricating and hydraulic oil, bait tanks and/or live wells; plus ballast
water at 100 % capacity;
— consumable liquids in portable tanks (drinking water, fuel) filled to 95 % of the maximum capacity;
— dinghy or other small craft intended to be carried aboard, and any outboard motor associated with them;
— liferaft(s) if carried in excess of the minimum required in essential safety equipment;
— non-edible stores and equipment normally carried on the boat and not included in the manufacturer’s list
of standard equipment, e.g. loose internal equipment and tools, spare parts, additional anchors or sails,
dinghy and outboard if carried aboard;
— an allowance for the maximum mass of optional equipment and fittings not included in the manufacturer’s
basic outfit
NOTE 1 Liferafts are not included in essential safety equipment for Categories C and D.
NOTE 2 As a guide, not less than 20 kg per person should be allowed for personal effects on habitable boats.
NOTE 3 As a guide, the mass of yachting liferafts varies from approximately 12 + 2CL (kg) to double this, according to
specification.
NOTE 4 Unless otherwise required, variable position elements (e.g. canting keels, movable solid ballast, tilting masts)
are positioned symmetrically about the centreline of the boat.
NOTE 5 Any centreboard or keel is in the raised position unless it can be fixed in the lowered position and an appropriate
instruction is given in the owner’s manual.
NOTE 6 The mass of maximum load is denoted by m and is expressed in kilograms.
L
3.5.5
maximum load condition
boat in the light craft condition with the maximum load added so as to produce the design trim
NOTE The mass in the maximum load condition is denoted by m and is expressed in kilograms.
LDC
3.5.6
loaded arrival condition
boat in the maximum load condition minus 85 % of the maximum capacity of fixed or portable storage tanks for
fuel, oils and drinking water, and minus 90 % of edible stores, but including the worst combination of optional
fittings or equipment with respect to stability
NOTE 1 The mass in the loaded arrival condition is denoted by m and is expressed in kilograms.
LA
NOTE 2 Unless otherwise required, variable position elements (e.g. canting keels, movable solid ballast, tilting masts)
are positioned symmetrically about the centreline of the boat.
8 © ISO 2013 – All rights reserved

ISO 12217-2:2013(E)
3.5.7
displacement volume
V
D
volume of displacement of the boat that corresponds to the appropriate loading condition, taking the density of
water as 1 025 kg/m
NOTE Displacement volume is expressed in cubic metres.
3.6 Other terms and definitions
3.6.1
calculation wind speed
v
W
wind speed used in calculations
NOTE Calculation wind speed is expressed in metres per second or in knots.
3.6.2
crew
collective description of all persons onboard a boat
3.6.3
crew limit
CL
maximum number of persons (with a mass of 75 kg each) used when assessing the design category
3.6.4
design trim
longitudinal attitude of a boat when upright, with crew, fluids, stores and equipment in the positions designated
by the designer or builder
NOTE Crew are assumed to be in positions designated by the builder. In the absence of builder’s instructions, crew
and gear are assumed to be positioned in a manner most likely to provide a favourable test result, provided that such
positions are consistent with the proper operation of the boat and that crew are assumed to be either standing at designated
positions fitted with handholds, or seated.
3.6.5
essential safety equipment
loose equipment considered essential to the safe operation of the boat, which may include distress flares
and rockets, lifebuoy with light and battery, first aid box, wire cutters for standing rigging, lifejackets, safety
harnesses and lines, portable firefighting equipment, flashlight, binoculars, radio (e.g. VHF), ball and cone
visual signals, charts, navigational publications and for design categories A and B, liferaft(s) sufficient for the
crew limit in the corresponding design category
NOTE 1 Quantities carried may vary according to the size of boat, design category and crew limit.
NOTE 2 As a guide, the mass allowed for essential safety equipment but excluding any liferaft(s) should not be less
than 3L (kg).
H
NOTE 3 The mass of yachting liferafts varies from approximately 12 + 2CL (kg) to double this, according to specification.
NOTE 4 Liferafts are not considered to be essential safety equipment in design categories C and D.
3.6.6
flotation element
element which provides buoyancy to the boat and thus influences the flotation characteristics
3.6.6.1
air tank
tank made of hull construction material, and integral with hull or deck structure
ISO 12217-2:2013(E)
3.6.6.2
air container
container made of stiff material, and not integral with the hull or deck structure
3.6.6.3
low density material
material with a specific gravity of less than 1,0 primarily incorporated into the boat to enhance the buoyancy
when swamped
3.6.6.4
inflated bag
bag made of flexible material, not integral with hull or deck, accessible for visual inspection and intended
always to be inflated when the boat is being used
NOTE Bags intended to be inflated automatically when immersed (e.g. at the masthead as a means to prevent
inversion) are not regarded as flotation elements.
3.6.7
inclining experiment
method by which the vertical position of the centre of gravity (VCG) of a boat can be determined
NOTE 1 The VCG, together with a knowledge of the shape of the hull (the lines plan) and the position of the waterline
in a known loading condition, enable all the intact stability
...