EN ISO 12217-3:2015

SLOVENSKI STANDARD
01-januar-2016
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SIST EN ISO 12217-3:2013
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Small craft - Stability and buoyancy assessment and categorization - Part 3: Boats of hull
length less than 6 m (ISO 12217-3:2015)
Kleine Wasserfahrzeuge - Stabilitäts- und Auftriebsbewertung und Kategorisierung - Teil
3: Boote unter 6 m Rumpflänge (ISO 12217-3:2015)
Petits navires - Évaluation et catégorisation de la stabilité et de la flottabilité - Partie 3:
Bateaux d'une longueur de coque inférieure à 6 m (ISO 12217-3:2015)
Ta slovenski standard je istoveten z: EN ISO 12217-3:2015
ICS:
47.080 ýROQL Small craft
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12217-3
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2015
EUROPÄISCHE NORM
ICS 47.080 Supersedes EN ISO 12217-3:2013
English Version
Small craft - Stability and buoyancy assessment and
categorization - Part 3: Boats of hull length less than 6 m
(ISO 12217-3:2015)
Petits navires - Évaluation et catégorisation de la Kleine Wasserfahrzeuge - Stabilitäts- und
stabilité et de la flottabilité - Partie 3: Bateaux d'une Auftriebsbewertung und Kategorisierung - Teil 3:
longueur de coque inférieure à 6 m (ISO 12217- Boote unter 6 m Rumpflänge (ISO 12217-3:2015)
3:2015)
This European Standard was approved by CEN on 10 July 2015.

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

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12217-3:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered . 4

European foreword
This document (EN ISO 12217-3:2015) 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 May 2016, and conflicting national standards shall be
withdrawn at the latest by May 2016.
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 12217-3:2013.
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(s).
For relationship with EU Directive(s), 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 12217-3:2015 has been approved by CEN as EN ISO 12217-3:2015 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/075 to
provide one voluntary means of conforming to essential requirements 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 (OJ L 354, 28.12.2013, p. 90–131).
Once this standard is cited in the Official Journal of the European Union under that Directive,
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 corresponding essential requirements
of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard
and Annex IA of Directive 2013/53/EU
Essential Requirements of
Clause(s)/sub-clause(s) of this EN Remarks/Notes
Directive 2013/53/EU
Design categories A, B, C and D
defined in the standard are
Annex IA2, Clause 3.2, Stability and
considered to correspond to design
Clause 5, Clause 6, Clause 7,
Freeboard, Clause 3.5, Flooding, and
categories A, B, C and D of
Clauses 3.6 and 3.2, maximum
Annexes A, B, C, D
Directive 2013/53/EU.
recommended load.
Excludes habitable sailing
multihulls.
6.6, 6.7, 7.4, 7.8,
Annex IA2, Clause 3.3, Buoyancy and

flotation.
Annexes B, C, D
Annex IA2, Clause 2.5, Owner’s
Annex E
manual
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 12217-3
Third edition
2015-10-15
Small craft — Stability and buoyancy
assessment and categorization —
Part 3:
Boats of hull length less than 6 m
Petits navires — Évaluation et catégorisation de la stabilité et de la
flottabilité —
Partie 3: Bateaux d’une longueur de coque inférieure à 6 m
Reference number
ISO 12217-3:2015(E)
©
ISO 2015
ISO 12217-3:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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copyright@iso.org
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ii © ISO 2015 – All rights reserved

ISO 12217-3:2015(E)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
3.1 Primary . 2
3.2 Downflooding . 4
3.3 Condition and mass . 5
3.4 Other definitions . 7
4 Symbols . 9
5 Procedure.10
5.1 Maximum load .10
5.2 Sailing or non-sailing .10
5.3 Tests to be applied .11
5.3.1 General.11
5.4 Alternatives .11
5.5 Variation in input parameters . .11
6 Tests to be applied to non-sailing boats .12
6.1 General .12
6.2 Habitable non-sailing multihull boats .13
6.3 Downflooding .13
6.3.1 Requirements for downflooding openings .13
6.3.2 Downflooding height with maximum load .15
6.3.3 Downflooding height — outboard boats when starting .18
6.4 Recess size .18
6.4.1 Application .18
6.4.2 Simplified methods .19
6.4.3 Direct calculation method .20
6.5 Offset-load test .20
6.5.1 General.20
6.5.2 Simplified procedure for offset-load test .22
6.5.3 Full procedure for offset load-test .24
6.5.4 Procedure for gunwale load test .26
6.6 Heel due to wind action .27
6.6.1 General.27
6.6.2 Calculation .27
6.6.3 Requirement .27
6.7 Level flotation test .27
6.8 Basic flotation test.28
6.9 Capsize-recovery test .28
6.10 Detection and removal of water .29
7 Tests to be applied to sailing boats.29
7.1 General .29
7.2 Downflooding .30
7.3 Recess size .31
7.4 Flotation tests .31
7.4.1 Level flotation test .31
7.4.2 Basic flotation test .31
7.5 Capsize-recovery test .31
7.6 Knockdown recovery test .32
7.7 Wind stiffness test .33
7.7.1 General.33
ISO 12217-3:2015(E)
7.7.2 Practical test .33
7.7.3 Compliance by calculation .34
7.7.4 Requirements .35
7.8 Inverted buoyancy .36
8 Safety signs .37
9 Application .37
9.1 Deciding the design category .37
9.2 Meaning of the design categories.37
Annex A (normative) Full method for required downflooding height .38
Annex B (normative) Methods for calculating downflooding angle .41
Annex C (normative) Method for flotation tests .43
Annex D (normative) Flotation material and elements .48
Annex E (normative) Calculation method for basic flotation requirement .50
Annex F (normative) Information for owner’s manual .52
Annex G (informative) Summary of requirements.57
Annex H (informative) Worksheets .59
Annex I (informative) Illustration of recess retention level .76
Bibliography .77
iv © ISO 2015 – All rights reserved

ISO 12217-3:2015(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 188, Small craft.
This third edition cancels and replaces the second edition (ISO 12217-3:2013), of which it constitutes a
minor revision. It incorporates the following modifications:
— Introduction and Clause 9.2: the reference to the European Directive has been updated (2013/53/EU);
— Clause 1, subclauses 6.2, 6.3.1.5 d) 3) and F.2 g): vulnerable has been replaced with susceptible.
— Clause 3: definitions 3.1.1, 3.3.5 and 3.4.9 have been amended;
— Subclause 6.3.2.2 c): option 5 has been included;
— Subclauses 6.4.2.3 and 6.4.2.4: the formulae coefficients have been corrected;
— Subclauses 6.5.2.5 and 6.5.3.3 e) 2) and Table G.1 have been slightly amended to remove
inconsistencies.
— Subclause 6.6.1 and Table G.1: the formulae have been harmonised with ISO 12217-1;
— Subclause 7.5.1 b) has been aligned with the text in ISO 12217-2.
— Subclause 9.2: the text has been amended;
— Annex H: worksheets 2, 4, 6, 8 and 15 have been corrected to align with corrections listed above;
— Annex I has been added;
— Bibliography: reference to ISO 7010 has been added;
— Editorial and cross-referencing corrections have been made to definitions 3.2.2 and 3.2.3 and to
subclauses, 6.4.1, 6.4.2.1, 6.4.2.2 and 6.4.2.3 , to Table G.2, and to Annex H, worksheet 6.
ISO 12217 consists of the following parts, under the general title Small craft — Stability and buoyancy
assessment and categorization:
ISO 12217-3:2015(E)
— 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
vi © ISO 2015 – All rights reserved

ISO 12217-3:2015(E)
Introduction
This part of ISO 12217 enables the determination of the limiting environmental conditions to be
determined 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.
Annex H provides worksheets to assist in the systematic assessment of a boat according to this part
of ISO 12217.
INTERNATIONAL STANDARD ISO 12217-3:2015(E)
Small craft — Stability and buoyancy assessment and
categorization —
Part 3:
Boats of hull length less than 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 craft susceptible 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 (C or D) appropriate to its design and maximum load.
This part of ISO 12217 is applicable to boats of hull length less than 6 m, whether propelled by human
or mechanical power, except habitable sailing multihulls. Boats of hull length less than 6 m which are
fitted with a full deck and quick-draining cockpit(s) complying with ISO 11812 may alternatively be
assessed using ISO 12217-1 or ISO 12217-2 (for non-sailing and sailing boats, respectively), in which
case higher design categories may be assigned.
In relation to habitable multihulls, this part of ISO 12217 includes assessment of susceptibility 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;
— personal watercraft covered by ISO 13590 and other similar powered craft;
— aquatic toys;
— canoes and kayaks;
— gondolas and pedalos;
— sailing surfboards;
— surfboards, including powered surfboards;
— hydrofoils, foil stabilized boats 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.
ISO 12217-3:2015(E)
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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 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 10240, Small craft — Owner’s manual
ISO 11812, Small craft — Watertight cockpits and quick-draining cockpits
ISO 12216, Small craft — Windows, portlights, hatches, deadlights and doors — Strength and
watertightness requirements
ISO 12217-1:2015, Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-
sailing boats of hull length greater than or equal to 6 m
ISO 12217-2:2015, Small craft — Stability and buoyancy assessment and categorization — Part 2: Sailing
boats of hull length greater than or equal to 6 m
ISO 14946, Small craft — Maximum load capacity
ISO 15083, Small craft — Bilge-pumping systems
ISO 15085, 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.
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 9.2.
3.1.2
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.
2 © ISO 2015 – All rights reserved

ISO 12217-3:2015(E)
3.1.3
quick-draining recess
recess fulfilling all the requirements of ISO 11812 for “quick-draining cockpits and recesses”
Note 1 to entry: ISO 11812 contains requirements with which most sailing dinghies cannot comply.
Note 2 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.
3.1.4
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.
3.1.5
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 F )/40,
H H M
and
all closing appliances having their degree of watertightness in accordance with ISO 12216
Note 1 to entry: The size of recesses permitted for some boats of design category C is restricted by the
requirements of 6.4.
3.1.6
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
— 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 may shed
H H M
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.
ISO 12217-3:2015(E)
Key
1 recess area open from above (less than two-thirds of the total sheerline area)
2 sheerline
3 open shelter or enclosed cabin
Figure 1 — Partially protected boat
3.1.7
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.
3.2 Downflooding
3.2.1
downflooding opening
any 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 6.3.1.5
4 © ISO 2015 – All rights reserved

ISO 12217-3:2015(E)
3.2.2
downflooding height
h
D
smallest height above the waterline to any downflooding opening (apart from those excluded in
6.3.1.5) when the boat is upright in calm water 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.
3.2.3
downflooding angle
ϕ
D
angle of heel at which the downflooding openings (apart from those excluded in 6.3.1.5) become
immersed, when the boat is in calm water and in the appropriate loading condition at design trim
Note 1 to entry: Downflooding angle may be determined using either of the methods in Annex B.
Note 2 to entry: Where openings are not symmetrical about the centreline of the boat, the case resulting in the
smallest angle is used.
Note 3 to entry: Downflooding angle is expressed in degrees.
3.3 Condition and mass
3.3.1
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;
— fixed navigational and electronic equipment;
— fixed fire fighting equipment, where fitted;
ISO 12217-3:2015(E)
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), standing and running rigging, in the stowed position ready for use; all standing
and running rigging in place;
Note 1 to entry: The mass in the empty craft condition is denoted by m and is expressed in kilograms.
EC
3.3.2
light craft condition
empty craft condition plus standard equipment (3.4.10) 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, 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 to entry: For the minimum mass of outboard engines and batteries, refer to Tables C.1 and C.2.
Note 2 to entry: The mass in the light craft condition is denoted by m and is expressed in kilograms.
LC
3.3.3
maximum load
greatest load which the boat is designed to carry in addition to the light craft condition, comprising:
— the crew limit at 75 kg each (adult) or 37,5 kg (child);
— 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 to entry: Liferafts are not included in essential safety equipment for Categories C and D.
6 © ISO 2015 – All rights reserved

ISO 12217-3:2015(E)
Note 2 to entry: As a guide, not less than 20 kg/person should be allowed for personal effects on habitable boats
Note 3 to entry: As a guide, the mass of yachting liferafts varies from approximately 12 + 2CL (kg) to double this,
according to specification.
Note 4 to entry: The mass of maximum load is denoted by m and is expressed in kilograms.
L
3.3.4
maximum load condition
boat in the light craft condition with the maximum load added so as to produce the design trim
Note 1 to entry: The mass in the maximum load condition is denoted by m and is expressed in kilograms.
LDC
3.3.5
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 to entry: In this condition, tanks have 10 % of their maximum capacity remaining.
Note 2 to entry: The mass in the loaded arrival condition is denoted by m and is expressed in kilograms.
LA
3.4 Other definitions
3.4.1
crew
collective description of all persons on board a boat
3.4.2
crew limit
CL
maximum number of persons (with a mass of 75 kg each) used when assessing the design category
Note 1 to entry: A half number denotes a child weighing less than 37,5 kg.
3.4.3
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 1 to entry: 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.
3.4.4
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 fire fighting equipment, flashlight, binoculars, radio (e.g. VHF), ball
and cone visual signals, charts and navigational publications in the corresponding design category
Note 1 to entry: Quantities carried may vary according to the size of boat, design category and crew limit.
Note 2 to entry: 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 to entry: Liferafts are not considered to be essential safety equipment in design categories C and D.
ISO 12217-3:2015(E)
3.4.5
flotation element
element which provides “buoyancy” to the boat and thus influences the flotation characteristics
3.4.5.1
air tank
tank made of hull construction material, and integral with hull or deck structure
3.4.5.2
air container
container made of stiff material, and not integral with the hull or deck structure
3.4.5.3
low density material
material with a specific gravity of less than 1,0 primarily incorporated into the boat to enhance the
buoyancy when swamped
3.4.5.4
rib collar
heavy duty tubular collar fitted around the periphery of the boat and always intended to be inflated
whenever the boat is being used
3.4.5.5
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 1 to entry: 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.
3.4.6
length of hull
L
H
length of
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