EN ISO 12217-1:2013

SLOVENSKI STANDARD
01-maj-2013
1DGRPHãþD
SIST EN ISO 12217-1:2002
SIST EN ISO 12217-1:2002/A1:2009
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Small craft - Stability and buoyancy assessment and categorization - Part 1: Non-sailing
boats of hull length greater than or equal to 6 m (ISO 12217-1:2013)
Kleine Wasserfahrzeuge - Stabilitäts- und Auftriebsbewertung und Kategorisierung - Teil
1: Nicht-Segelboote ab 6 m Rumpflänge (ISO 12217-1:2013)
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 12217-1:2013)
Ta slovenski standard je istoveten z: EN ISO 12217-1:2013
ICS:
47.080 ýROQL Small craft
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 12217-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2013
ICS 47.080 Supersedes EN ISO 12217-1:2002
English Version
Small craft - Stability and buoyancy assessment and
categorization - Part 1: Non-sailing boats of hull length greater
than or equal to 6 m (ISO 12217-1:2013)
Petits navires - Évaluation et catégorisation de la stabilité et Kleine Wasserfahrzeuge - Stabilitäts- und
de la flottabilité - Partie 1: Bateaux à propulsion non vélique Auftriebsbewertung und Kategorisierung - Teil 1: Nicht-
d'une longueur de coque supérieure ou égale à 6 m (ISO Segelboote ab 6 m Rumpflänge (ISO 12217-1:2013)
12217-1:2013)
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 12217-1:2013: 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 12217-1:2013) 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 12217-1:2002.
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 12217-1:2013 has been approved by CEN as EN ISO 12217-1:2013 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
Annex IA, Clause 3.2, Stability
and Freeboard; Clause 3.3,
Buoyancy and flotation; Clause
5, 6, Annexes A, B, C, D, E 3.5, Flooding; Clause 3.6,
Maximum recommended load;
and Clause 3.8, Escape in the
event of inversion.
Design categories A, B, C and D
defined in the standard are
considered to equate to design
7 Annex IA1 Design categories
categories A, B, C and D of the
Directive 94/25/EC as amended
by 2003/44/EC.
Annex IA2, Clause 3.3, Buoyancy
6.8, Annexes F, G
and flotation.
Annex IA2, Clause 2.5, Owner’s
Annex H
manual
WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling
within scope of this standard.

INTERNATIONAL ISO
STANDARD 12217-1
Second edition
2013-03-01
Small craft — Stability and buoyancy
assessment and categorization —
Part 1:
Non-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 1: Bateaux à propulsion non vélique d’une longueur de coque
supérieure ou égale à 6 m
Reference number
ISO 12217-1:2013(E)
©
ISO 2013
ISO 12217-1:2013(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 12217-1:2013(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Primary . 2
3.2 Downflooding . 4
3.3 Dimensions, areas and angles . 5
3.4 Condition, mass and volume . 7
3.5 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 and calculations to be applied .13
5.4 Variation in input parameters .13
6 Tests, calculations and requirements .14
6.1 Downflooding .14
6.2 Offset-load test .19
6.3 Resistance to waves and wind .20
6.4 Heel due to wind action .22
6.5 Recess size .23
6.6 Habitable multihull boats .26
6.7 Motor sailers .26
6.8 Flotation requirements .27
6.9 Detection and removal of water .27
7 Application .27
7.1 Deciding the design category .27
7.2 Meaning of the design categories .27
Annex A (normative) Full method for required downflooding height.29
Annex B (normative) Method for offset-load test .32
Annex C (normative) Methods for calculating downflooding angle .40
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 .57
Bibliography .74
ISO 12217-1:2013(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 12217-1 was prepared by Technical Committee ISO/TC 188, Small craft.
This second edition cancels and replaces the first edition (ISO 12217-1:2002), which has been technically
revised. It also incorporates the Amendment ISO 12217-1:2002/Amd.1:2009.
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
iv © ISO 2013 – All rights reserved

ISO 12217-1:2013(E)
Introduction
This part of ISO 12217 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 94/25/
EC as amended by Directive 2003/44/EC.
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.
INTERNATIONAL STANDARD ISO 12217-1:2013(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 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 total load.
This part of ISO 12217 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 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;
— 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.
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 12217-1:2013(E)
ISO 2896, 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 12217-2:2013, Small craft — Stability and buoyancy assessment and categorization — Part 2: 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
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 by this part of ISO 12217
NOTE 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 (3.3.8)
2/3
A < 0,07(m ) , where m is the mass of the boat in the maximum load condition, expressed in kilograms
S LDC LDC
3.1.3
recess
volume open to the air that might retain water within the range of loading conditions and corresponding trims
EXAMPLES Cockpits, wells, open volumes or areas bounded by bulwarks or coamings.
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.
2 © ISO 2013 – All rights reserved

ISO 12217-1:2013(E)
3.1.4
quick-draining recess
recess fulfilling all the requirements of ISO 11812 for “quick-draining cockpits and recesses”
NOTE 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 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 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 6.5.
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
— 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 shed
H H M
water via drains
NOTE 1 This is illustrated in Figure 1.
NOTE 2 Outboard engine wells are considered to provide a covering suitable for this purpose.
ISO 12217-1:2013(E)
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 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.
3.2 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
4 © ISO 2013 – All rights reserved

ISO 12217-1:2013(E)
3.2.2
downflooding angle
f
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 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;
NOTE 3 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 Downflooding height is expressed in metres.
NOTE 2 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 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 For multihull boats, L relates to that of the longest individual hull.
WL
NOTE 2 Length waterline is expressed in metres.
3.3.3
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.
ISO 12217-1:2013(E)
3.3.4
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 all hulls, the boat being upright, in the appropriate loading condition
and at design trim
NOTE Beam waterline is expressed in metres.
3.3.5
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.
3.3.6
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.
3.3.7
windage area
A
LV
projected profile area of hull, superstructures, deckhouses, outboard motors and spars above the waterline at
the appropriate loading condition, the boat being upright
NOTE 1 Canopies and screens that can be erected when under way in bad weather are included, e.g. cockpit
dodgers, pram hoods.
NOTE 2 Windage area is expressed in square metres.
3.3.8
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.
3.3.9
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.
6 © ISO 2013 – All rights reserved

ISO 12217-1:2013(E)
3.4 Condition, mass and volume
3.4.1
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;
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 The mass in the empty craft condition is denoted by m and is expressed in kilograms.
EC
3.4.2
light craft condition
empty craft condition plus standard equipment (3.5.12) 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;
ISO 12217-1:2013(E)
c) all upwind sails supplied or recommended by the builder, 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 F.1 and F.2.
NOTE 2 The mass in the light craft condition is denoted by m and is expressed in kilograms.
LC
3.4.3
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,
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 The mass in the minimum operating condition is denoted by m and is expressed in kilograms
MO
3.4.4
maximum load
load which the boat is designed to carry in addition to the light craft condition, comprising:
— the crew limit at 75kg 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, 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 design 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.
8 © ISO 2013 – All rights reserved

ISO 12217-1:2013(E)
NOTE 4 The mass of maximum load is denoted by m and is expressed in kilograms.
L
3.4.5
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
3.4.6
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 The mass in the loaded arrival condition is denoted by m and is expressed in kilograms.
LA
3.4.7
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.
3.5 Other terms and definitions
3.5.1
calculation wind speed
v
W
wind speed to be used for calculations
NOTE Calculation wind speed is expressed in metres per second.
3.5.2
crew
collective description of all persons onboard a boat
3.5.3
crew limit
CL
maximum number of persons (with a mass of 75 kg each) used when assessing the design category
3.5.4
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.
3.5.5
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, lifejackets, safety harnesses and lines, portable fire
fighting 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.
ISO 12217-1:2013(E)
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.
3.5.6
flotation element
element which provides buoyancy to the boat and thus influences its flotation characteristics
3.5.6.1
air tank
tank made of hull construction material, and integral with hull or deck structure
3.5.6.2
air container
container made of stiff material, and not integral with the hull or deck structure
3.5.6.3
low density material
material with a specific gravity of less than 1,0 primarily incorporated into the boat to enhance the buoyancy
when swamped
3.5.6.4
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
3.5.6.5
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 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.
3.5.7
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, enables all the intact stability parameters to be calculated.
NOTE 2 A full description of how to conduct an inclining experiment is given in standard naval architecture textbooks,
e.g. references [2] and [3] in the bibliography.
3.5.8
loaded waterline
waterline of the boat when upright in the maximum load condition
3.5.9
recess retention level
level of water in recesses, other than those described by 6.5.1 a) to d), at which the unobstructed drainage area,
when the boat is in the loaded arrival condition and at design trim, exceeds 5% of the volume of the recess to
the lowest point of the peripheral coaming, assuming any gates or doors are sealed
NOTE The area of drainage openings is expressed in square metres and the volume is expressed in cubic metres.
10 © ISO 2013 – All rights reserved

ISO 12217-1:2013(E)
3.5.10
righting lever
GZ
at a specific heel or trim angle in calm water, the distance in both the horizontal and transverse planes between
the centre of buoyancy and the centre of gravity
NOTE Righting lever is equal to the righting moment divided by the product of mass, in kilograms, and acceleration
due to gravity (9,806 m/s ) and is expressed in metres.
3.5.11
righting moment
RM
at a specific heel or trim angle in calm water, the restoring moment generated by the transverse offset of the
centre of buoyancy of the submerged part of the hull from the centre of gravity of the boat
NOTE 1 The righting moment varies with heel angle and is usually plotted graphically against heel angle. Righting
moments are most accurately derived by computer from knowledge of the hull shape and the location of the centre of
gravity. Other more approximate methods are also available. The righting moment varies substantially with hull form,
centre of gravity position, boat mass and trim attitude.
NOTE 2 Righting moment is expressed in newton metres or kilonewton metres.
3.5.12
standard equipment
devices including outboard motors (excluding those for tenders), loose furniture and furnishings such as tables,
chairs, non-permanently installed mattresses, curtains, etc., portable bilge pumping equipment, anchors, chain,
warps, sails, loose external equipment such as fenders, boathook and boarding ladder, oars (if appropriate),
and essential safety equipment
NOTE 1 Where outboard engine(s) are fitted, the heaviest engine(s) recommended for the boat by the manufacturer
is(are) included, the mass allowed for outboard engines and their batteries (if not permanently installed) not being less than
that given in columns 1 and 3 of Tables F.1 and F.2.
NOTE 2 As a guide, the mass allowed for anchors, anchor chain, warps and fenders should not be less than about
2,2
0,25L (kg). In some cases up to double this mass may be appropriate.
H
3.5.13
watertightness degree
degree of watertightness as specified in ISO 11812 and ISO 12216
NOTE The degree of watertightness is summarized as follows.
Degree 1: Degree of tightness providing protection against effects of continuous immersion in water.
Degree 2: Degree of tightness providing protection against effects of temporary immersion in water.
Degree 3: Degree of tightness providing protection against splashing water.
Degree 4: Degree of tightness providing protection against water drops falling at an angle of up to 15° from the vertical.
3.5.14
under way
not at anchor, or made fast to the shore, or aground
4 Symbols
For the purposes this part of ISO 12217, the symbols and associated units in Table 1 apply.
ISO 12217-1:2013(E)
Table 1 — Symbols
Symbol Unit Meaning
f degree (°) Angle of heel
f degree (°) Downflooding angle of any downflooding opening, see 3.2.2
D
f degree (°) Downflooding angle at which a certain area of openings are submerged, see 3.2.2
DA
f degree (°) Angle of heel at which maximum righting moment or lever occurs
GZmax
f degree (°) Angle of heel measured during offset-load test, see 6.2 and Annex B
O
f degree (°) Maximum permitted heel angle during offset-load test, see 6.2.3
O(R)
f degree (°) Assumed roll angle in a seaway, see 6.3.2
R
...