Small craft - Watertight cockpits and quick-draining cockpits (ISO 11812:2001)

This International Standard specifies requirements for cockpits and recesses to be designated either as “watertight”
or as “quick-draining” on small craft of hull length up to 24 m.
It does not set requirements for the size and shape of a cockpit or recess, nor when or where it shall be used. It
only considers draining by gravity, and not by pumping or other methods.
NOTE 1 The term “quick-draining cockpit” has been chosen to differentiate from the common understanding of “self-draining
cockpit” where water may be drained overboard in certain conditions, but without specified draining speed, height of bottom or
sill, etc.
NOTE 2 Examples of single-plane cockpit bottoms are given in informative annex A.

Kleine Wasserfahrzeuge - Wasserdichte und schnell-lenzende Plichten (ISO 11812:2001)

Petits navires - Cockpits étanches et cockpits rapidement autovideurs (ISO 11812:2001)

Mala plovila - Vodotesni krmarjevi prostori in krmarjevi prostori s hitrim odvodnjavanjem (ISO 11812:2001)

Ta mednarodni standard določa zahteve za krmarjeve prostore in kabine, ki so označeni kot »vodotesni« ali kot »s hitrim odvajanjem« v malih plovilih z dolžino trupa do 24 m.
Ne določa zahtev glede velikosti in oblike krmarjevega prostora/kabine ali glede časa/načina njegove/njene uporabe. Obravnava odvodnjavanje zgolj na podlagi težnosti in ne na podlagi črpanja ali drugih metod.
OPOMBA 1: Izraz »krmarjevi prostori s hitrim odvodnjavanjem« je bil izbran za namene razlikovanja od splošnega izraza »krmarjevi prostori s samodejnim odvodnjavanjem«, pri katerem se voda v nekaterih pogojih lahko odvaja čez krov, vendar brez opredeljene hitrosti odvajanja, višine dna ali praga itd.
OPOMBA 2: Primeri enodelnega dna krmarjevih prostorov so podani v informativnem dodatku A.

General Information

Status
Published
Public Enquiry End Date
14-Mar-2018
Publication Date
08-Oct-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Oct-2018
Due Date
10-Dec-2018
Completion Date
09-Oct-2018

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SLOVENSKI STANDARD
SIST EN ISO 11812:2018
01-december-2018
1DGRPHãþD
SIST EN ISO 11812:2002
Mala plovila - Vodotesni krmarjevi prostori in krmarjevi prostori s hitrim
odvodnjavanjem (ISO 11812:2001)
Small craft - Watertight cockpits and quick-draining cockpits (ISO 11812:2001)
Kleine Wasserfahrzeuge - Wasserdichte und schnell-lenzende Plichten (ISO
11812:2001)

Petits navires - Cockpits étanches et cockpits rapidement autovideurs (ISO 11812:2001)

Ta slovenski standard je istoveten z: EN ISO 11812:2018
ICS:
47.080 ýROQL Small craft
SIST EN ISO 11812:2018 en,fr,de

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

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SIST EN ISO 11812:2018
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SIST EN ISO 11812:2018
EN ISO 11812
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2018
EUROPÄISCHE NORM
ICS 47.080 Supersedes EN ISO 11812:2001
English Version
Small craft - Watertight cockpits and quick-draining
cockpits (ISO 11812:2001)

Petits navires - Cockpits étanches et cockpits Kleine Wasserfahrzeuge - Wasserdichte und schnell-

rapidement autovideurs (ISO 11812:2001) lenzende Plichten (ISO 11812:2001)
This European Standard was approved by CEN on 16 April 2018.

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

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

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11812:2018 E

worldwide for CEN national Members.
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SIST EN ISO 11812:2018
EN ISO 11812:2018 (E)
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

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SIST EN ISO 11812:2018
EN ISO 11812:2018 (E)
European foreword

The text of ISO 11812:2001 has been prepared by Technical Committee ISO/TC 188 “Small craft” of the

International Organization for Standardization (ISO) and has been taken over as EN ISO 11812:2018.

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 March 2019, and conflicting national standards shall be

withdrawn at the latest by March 2019.

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

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

This document supersedes EN ISO 11812:2001.

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 2013/53/EU.

For relationship with EU Directive 2013/53/EU, 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

the United Kingdom.
Endorsement notice

The text of ISO 11812:2001 has been approved by CEN as EN ISO 11812:2018 without any modification.

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SIST EN ISO 11812:2018
EN ISO 11812:2018 (E)
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/542

C(2015) 8736 final to provide one voluntary means of conforming to Essential Requirements of Directive

2013/53/EU.

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 I of Directive

2013/53/EU
Essential Clause(s)/sub- Remarks/Notes
Requirements of clause(s) of
Directive this EN
2013/53/EU

Annex I, Part A, 3.5 – All Clauses, except 3.1 This Standard deals with cockpits and recesses that are

Flooding drained by gravity; it does not deal with removal of water
Annex B
by pumps or other means.
Annex C
Annex D
The design category sea and wind conditions given in clause
Annex E
3.1 of this Standard no longer apply.
The design category parameters set out in EN ISO 12217-
1:2015, Table 6 or EN ISO 12217-2:2015, Table 11 equate
to design categories A, B, C and D of Directive 2013/53/EU
and shall be applied when required.

Annex I, Part A, 2.5 – 10 In respect of information required to document a cockpit as

Owner’s Manual watertight (clause 5.2) or quick draining (clause 5.3) in the
Owner’s 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.
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SIST EN ISO 11812:2018
INTERNATIONAL ISO
STANDARD 11812
First edition
2001-12-15
Small craft — Watertight cockpits and
quick-draining cockpits
Petits navires — Cockpits étanches et cockpits rapidement autovideurs
Reference number
ISO 11812:2001(E)
ISO 2001
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
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© ISO 2001

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ii © ISO 2001 – All rights reserved
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
Contents Page

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

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

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

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

3 Terms and definitions ...................................................................................................................................2

4 Symbols..........................................................................................................................................................5

5 General requirements....................................................................................................................................6

5.1 Loading and measurement conditions........................................................................................................6

5.2 Requirements for “watertight” cockpits and recesses .............................................................................6

5.3 Requirements for “quick draining” cockpits and recesses......................................................................7

5.4 Closing appliances........................................................................................................................................7

6 Requirements for quick-draining cockpit bottom ......................................................................................7

6.1 Minimum cockpit bottom height, H .....................................................................................................7

B,min

6.2 Exception to 6.1 for recesses or lockers.....................................................................................................8

6.2.1 Exception up to 10 % of cockpit bottom area.............................................................................................8

6.2.2 Lockers in the cockpit bottom .....................................................................................................................8

7 Requirements for drainage of quick-draining cockpits.............................................................................8

7.1 Cockpit drainage............................................................................................................................................8

7.1.1 General............................................................................................................................................................8

7.1.2 When the boat is upright...............................................................................................................................8

7.1.3 When the boat is heeled................................................................................................................................8

7.2 Draining time..................................................................................................................................................9

7.3 Number of drains .........................................................................................................................................10

7.4 Minimum drain dimensions ........................................................................................................................10

7.4.1 Internal dimensions of the drain ................................................................................................................10

7.4.2 Eventual protective grids............................................................................................................................10

7.5 Centreboard housings and other types of drain ......................................................................................10

7.6 Drain fitting...................................................................................................................................................11

7.7 Drain piping design and construction.......................................................................................................11

7.8 Draining time assessment ..........................................................................................................................11

7.8.1 General..........................................................................................................................................................11

7.8.2 Measurement of the draining time .............................................................................................................11

7.8.3 Calculation of the draining time.................................................................................................................12

7.8.4 Quick method of calculation for cockpit fitted with two drains..............................................................12

8 Requirements for sills.................................................................................................................................14

8.1 Sill height for watertight cockpits..............................................................................................................14

8.2 Sill height and other requirements for quick-draining cockpits.............................................................14

8.2.1 Sill-height measurement.............................................................................................................................14

8.2.2 Requirements for sill height of quick draining cockpits .........................................................................14

8.2.3 Requirements for companionway doors and appliances above sill height ..........................................14

8.2.4 Other requirements.....................................................................................................................................15

9 Watertightness requirements.....................................................................................................................15

9.1 Watertightness requirements of watertight cockpits ..............................................................................15

9.2 Watertightness requirements of quick-draining cockpits.......................................................................15

9.2.1 Watertightness of the cockpit ....................................................................................................................15

9.2.2 Permanently open ventilation openings ...................................................................................................16

10 Owner’s manual — Documentation...........................................................................................................16

© ISO 2001 – All rights reserved iii
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SIST EN ISO 11812:2018
ISO 11812:2001(E)

Annex A (informative) Examples of single-plane cockpit bottoms......................................................................17

Annex B (normative) Analysis of multi-level cockpit bottom...............................................................................19

Annex C (normative) Draining time calculation using tables...............................................................................26

Annex D (normative) Alternative method of calculation — Direct calculation with head losses .....................30

Annex E (normative) Watertightness tests.............................................................................................................33

Bibliography ..............................................................................................................................................................36

iv © ISO 2001 – All rights reserved
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SIST EN ISO 11812:2018
ISO 11812:2001(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 3.

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 International Standard may be the subject of

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

International Standard ISO 11812 was prepared by Technical Committee ISO/TC 188, Small craft.

Annexes B, C, D and E form a normative part of this International Standard.
Annex A is for information only.
© ISO 2001 – All rights reserved v
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
Introduction

The compliance to this International Standard may not be required to show that a boat fulfils the essential safety

requirements of the Directive 94/25/EC, but it may be required by ISO 12217.
vi © ISO 2001 – All rights reserved
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SIST EN ISO 11812:2018
INTERNATIONAL STANDARD ISO 11812:2001(E)
Small craft — Watertight cockpits and quick-draining cockpits
1 Scope

This International Standard specifies requirements for cockpits and recesses to be designated either as “watertight”

or as “quick-draining” on small craft of hull length up to 24 m.

It does not set requirements for the size and shape of a cockpit or recess, nor when or where it shall be used. It

only considers draining by gravity, and not by pumping or other methods.

NOTE 1 The term “quick-draining cockpit” has been chosen to differentiate from the common understanding of “self-draining

cockpit” where water may be drained overboard in certain conditions, but without specified draining speed, height of bottom or

sill, etc.

NOTE 2 Examples of single-plane cockpit bottoms are given in informative annex A.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of

this International Standard. For dated references, subsequent amendments to, or revisions of, any of these

publications do not apply. However, parties to agreements based on this International Standard are encouraged to

investigate the possibility of applying the most recent editions of the normative documents indicated below. For

undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC

maintain registers of currently valid International Standards.
ISO 8666:— , Small craft — Principal data

ISO 9093-1:1994, 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 12216:— , Small craft — Windows, portlights, hatches, deadlights and doors — Strength and tightness

requirements

ISO 12217-1:— , Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-sailing

boats of hull length greater than or equal to 6 m

ISO 12217-2:— , 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:— , Small craft — Stability and buoyancy assessment and categorization — Part 3: Boats of hull

length less than 6 m
1) To be published.
© ISO 2001 – All rights reserved 1
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
3 Terms and definitions

For the purposes of this International Standard, the following terms and definitions apply.

3.1
design categories

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

NOTE The following design categories apply:

 A: Ocean: Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and significant

wave heights of 4 m and above, and vessels largely self-sufficient; but excluding abnormal conditions such as hurricanes.

 B: Offshore: Designed for offshore voyages where conditions up to and including wind force 8 and significant wave

heights up to and including 4 m may be experienced;

 C: Inshore: Designed for voyages in coastal waters, large bays, estuaries, lakes and rivers where conditions up to and

including wind force 6 and significant wave heights up to and including 2 m may be experienced;

 D: Sheltered waters: Designed for voyages in close coastal waters, small bays, lakes, rivers and canals where conditions

up to and including wind force 4 and maximum wave heights up to and including 0,3 m may be experienced.

3.2
length of hull
length of the hull according to ISO 8666
NOTE Length of hull is expressed in metres.
3.3
maximum beam
max
overall beam of monohull or multihull craft according to ISO 8666
NOTE Maximum beam is expressed in metres.
3.4
waterline
waterline in the fully loaded ready-for-use condition
3.5
freeboard amidships

freeboard at mid-waterline in fully loaded ready-for-use condition according to ISO 8666

3.6
sailing boat

boat designed to use sails as its primary means of propulsion, as defined in ISO 12217-2

3.7
non-sailing boat

boat not designed to use sails as primary means of propulsion, as defined in ISO 12217-1

3.8
cockpit and recess

any area that may retain water, however briefly, due to rain, waves, boat heeling, etc.

2 © ISO 2001 – All rights reserved
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SIST EN ISO 11812:2018
ISO 11812:2001(E)

NOTE Cockpits are normally designed for accommodation of people but, for the purpose of this International Standard, the

term "cockpit” will be used either for a proper cockpit or for any recess. This means that

 bulwarks may create a large cockpit,

 open boats may effectively comprise a cockpit which includes nearly all the boat,

 cockpit(s) may be situated anywhere in the boat, and
 a cockpit may open aft to the sea.
3.9
watertight cockpit or recess

cockpit or recess which satisfies the requirements of this International Standard for watertightness and sill heights,

but not those for drainage
3.10
quick-draining cockpit or recess

cockpit with characteristics and draining capacity which fulfil all the requirements of this International Standard for

one or several design categories

NOTE According to its characteristics, a cockpit may be considered quick-draining for one design category, but maybe not

for a higher category.
3.11
cockpit sole
essentially horizontal surface(s) of the cockpit on which people normally stand
3.12
cockpit bottom
lowest surface of the cockpit sole where water collects before being drained

NOTE 1 Devices raising the standing level(s) from the rigid part of the cockpit sole, e.g. grating, stands, bridge decks, are not

considered as part of the cockpit bottom.

NOTE 2 The cockpit bottom is considered to comprise only one plane. A cockpit bottom with several levels is considered

according to annex B.
3.13
bridge deck

area just outside the companionway opening and above the cockpit bottom, onto which people normally step

before entering the accommodation
3.14
closing appliance
device used to cover an opening in the cockpit, hull or superstructures
EXAMPLE Hatch, window, door, engine cover, etc.
3.15
cockpit water-retention height

height of the water contained in the cockpit measured between the cockpit bottom and the point of overflow

outboard, the boat being upright, at rest and fully loaded

NOTE 1 This height corresponds to the lowest point where the overflow area, expressed in square metres, is

> 0,005 L B , and is usually the lowest point of the cockpit coaming.
H max

NOTE 2 For assessing h , every closing appliance, including the companionway door(s) is assumed to be closed.

© ISO 2001 – All rights reserved 3
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
3.16
cockpit bottom height

height of the cockpit bottom above the waterline, the boat being upright, at rest and fully loaded

NOTE For a single-plane cockpit bottom, H is measured at the centre of surface of this plane. For a multi-plane bottom, H

B B
is measured according to annex B.
3.17
minimum cockpit bottom height
B,min
minimum value of H required by this International Standard
3.18
drain

outlet of the cockpit enabling any water contained to be discharged outboard by gravity

NOTE A drain can be
 a pipe discharging overboard above or below the waterline,
 a part of the cockpit allowing direct discharge overboard,
 scuppers and freeing port,
 etc.
3.19
companionway opening
opening giving way to accommodation
NOTE There may be several companionway openings.
3.20
companionway door
door or closing appliance intended to close a companionway opening
3.21
washboards

closing appliance for companionway opening made of several mobile boards that, when closed, are stacked one on

top of each other
NOTE 1 This is a very frequent device on sailing monohulls.
NOTE 2 Boards are added as the weather worsens to constitute a higher sill.
3.22
sill

barrier above which water in the cockpit may enter companionway openings and downflood the boat

NOTE The lids to cockpit lockers or any opening other than the companionway opening, and leading into non-quick-draining

parts of the boat are not considered to be sills if the closing appliance covering them fulfils the watertightness requirements of

clause 9.
3.23
fixed sill
sill being a fixed, integral and permanent part of the cockpit
4 © ISO 2001 – All rights reserved
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
3.24
semi-fixed sill

any closing appliance movable but permanently attached to the boat which, when in place, constitutes a sill higher

than the fixed sill

EXAMPLE Sliding or hinged doors, hatches, sliding sills, but excluding washboards.

NOTE A lanyard is not regarded as a permanent attachment.
3.25
sill height

height of sill, either the top of a fixed sill, or of the mobile part, when closed, for a semi-fixed sill

3.26
minimum sill height
s,min
minimum value of sill height required by this International Standard
3.27
cockpit volume

volume, in cubic metres, of water that can be instantaneously contained in the cockpit before discharge, which is

the volume below h
3.28
cockpit volume coefficient
ratio between the cockpit volume and the reserve buoyancy
k =
LBF
Hmax M
3.29
degree of watertightness

ability of a closing appliance, fitting or surface, to resist ingress of water according to the conditions of protection

from water
NOTE The degreee of water tightness 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.

4 Symbols
Table 1 summarizes the main symbols used in this International Standard.
© ISO 2001 – All rights reserved 5
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SIST EN ISO 11812:2018
ISO 11812:2001(E)
Table 1 — Summary of symbols
Symbol Unit Meaning Subclause or annex
concerned
m Maximum beam 3.3, 3.28
max
C — Draining-time reduction coefficient Ann
...

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