Small craft - Watertight or quick draining recesses and cockpits (ISO/FDIS 11812:2019)

This document specifies watertightness, draining time and sill heights requirements for watertight and quick-draining recesses and cockpits in small craft of up to 24 m load line length (see Reference [1]).
Recesses located in elevated parts of the craft are covered by this document.
This document does not specify requirements for the size, the shape and the location of recesses or cockpits. It only considers draining by gravity, and not by pumping or other methods.
It only considers normal operation of the craft, but unattended craft recess issues are out of scope.
This document does not guarantee that the water contained in a watertight or quick-draining recess or cockpit will not affect the stability and buoyancy of the craft, which are covered by ISO 12217 (all parts):2015.

Kleine Wasserfahrzeuge - Wasserdichte und schnell-lenzende Plichten (ISO/FDIS 11812:2019)

Petits navires - Cavités et cockpits étanches ou autovideurs (ISO/FDIS 11812:2019)

Le présent document spécifie les exigences relatives à l'étanchéité, au temps de vidange et à la hauteur des surbaux pour les cavités et les cockpits étanches et rapidement autovideurs dans les petits navires d'une longueur de ligne de charge inférieure ou égale à 24 m (voir la Référence [1]).
Les cavités situées dans les parties surélevées du bateau sont couvertes par ce document.
Ce document ne spécifie pas les exigences concernant la taille, la forme et l'emplacement des cavités ou des cockpits. Il ne prend en compte que la vidange par gravité, et non par pompage ou par d'autres méthodes.
Il ne prend en compte que le fonctionnement normal du bateau, mais les problèmes relatifs aux cavités des bateaux laissés sans surveillance sont en dehors du domaine d'application.
Ce document ne garantit pas que l'eau contenue dans une cavité étanche et rapidement autovideuse n'affectera pas la stabilité et la flottabilité du bateau, qui sont couvertes par l'ISO 12217 (toutes les parties):2015.

Mala plovila - Vodotesni prostori ter prostori in kabine s hitrim odvajanjem vode (ISO/FDIS 11812:2019)

General Information

Status
Not Published
Public Enquiry End Date
15-May-2018
Technical Committee
Current Stage
5020 - Formal vote (FV) (Adopted Project)
Start Date
07-May-2019
Due Date
25-Jun-2019
Completion Date
10-May-2019

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SLOVENSKI STANDARD
oSIST prEN ISO 11812:2018
01-maj-2018

Mala plovila - Vodotesni prostori ter prostori in kabine s hitrim odvajanjem vode

(ISO/DIS 11812:2018)

Small craft - Watertight or quick draining recesses and cockpits (ISO/DIS 11812:2018)

Kleine Wasserfahrzeuge - Wasserdichte und schnell-lenzende Plichten (ISO/DIS
11812:2018)

Petits navires - Cavités et cockpits étanches ou autovideurs (ISO/DIS 11812:2018)

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

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

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oSIST prEN ISO 11812:2018
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oSIST prEN ISO 11812:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11812
ISO/TC 188 Secretariat: SIS
Voting begins on: Voting terminates on:
2018-02-21 2018-05-16
Small craft — Watertight or quick draining recesses and
cockpits
Petits navires — Cavités et cockpits étanches ou autovideurs
ICS: 47.080
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11812:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018
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oSIST prEN ISO 11812:2018
ISO/DIS 11812:2018(E) ISO/DIS 11812
Contents Page

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

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

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

3 Terms and definitions ............................................................................................................................ 1

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

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

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

5.2 Requirements for watertight and “quick draining” recesses ............................................................... 6

6 Watertightness requirements ............................................................................................................... 7

6.1 Watertightness requirements for “watertight” recesses ...................................................................... 7

6.2 Watertightness requirements for “quick draining” recesses ............................................................... 7

7 Requirements for companionway sills .................................................................................................. 7

7.1 Companionway sills concerned ............................................................................................................. 7

7.2 Recess with a “reduced risk of flooding” ............................................................................................... 8

7.3 Sill height measurement ........................................................................................................................ 8

7.4 Minimum companionway sill height for “quick draining” recesses..................................................... 9

8 Height of recess bottom above waterline for quick-draining recesses ............................................... 9

9 Quick-draining recesses – Single bottom recesses drainage ................................................................ 9

9.1 Drainage general requirements ............................................................................................................ 9

9.2 Drain requirements .............................................................................................................................. 10

9.2.1 Number and dimensions ...................................................................................................................... 10

9.2.2 Special provisions................................................................................................................................. 10

9.2.3 Installation ............................................................................................................................................ 10

9.3 Drainage calculations requirements ................................................................................................... 11

9.3.1 Drainage calculation principle and assessment methods .................................................................. 11

9.3.2 Simplified drainage assessment method............................................................................................. 12

10 Quick-draining recesses – Multi-bottom recesses drainage ............................................................... 13

10.1 Drainage general requirements .......................................................................................................... 13

10.2 Drainage requirements for foot basin ................................................................................................. 13

11 Owner’s manual — Documentation ..................................................................................................... 15

Annex A (normative) Full calculation method for draining time .................................................................... 16

A.1 Preliminary ........................................................................................................................................... 16

A.2 Procedure for calculation of a single bottom recess ........................................................................... 16

A.3 Equations and detail of calculation for a multiple bottom recess ...................................................... 18

A.4 Dimensions of non-circular drains ...................................................................................................... 19

A.5 Principle of calculation where the drain diameters are different ..................................................... 20

A.6 Determination of minor head loss coefficients K ................................................................................ 20

A.6.1 General .................................................................................................................................................. 20

COPYRIGHT PROTECTED DOCUMENT

Annex B (Informative) Examples of draining time calculation for single level and double level bottom

recesses ................................................................................................................................................. 24

© ISO 2018

B.1 Determination of the required drain diameter by direct calculation or simple method of

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

clause 10 ............................................................................................................................................... 24

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address B.2 Examples assessment of recesses with several bottom levels ........................................................... 26

below or ISO’s member body in the country of the requester.

B.2.1 Two bottoms recess without foot basin .............................................................................................. 26

ISO copyright office B.2.2 Closed recess with two bottom levels (see Figure B.3 a) ...................................................................... 26

CP 401 • Ch. de Blandonnet 8

B.2.3 Recess with two level bottom and aft part open (see Figure B.3 b) ..................................................... 27

CH-1214 Vernier, Geneva, Switzerland

B.3 Recess with foot basin .......................................................................................................................... 28

Tel. +41 22 749 01 11

B.3.1 Presentation ......................................................................................................................................... 28

Fax +41 22 749 09 47
copyright@iso.org

Annex C (normative) Watertightness tests ....................................................................................................... 30

www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
© ISO 2016 – All rights reserved iii
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oSIST prEN ISO 11812:2018
ISO/DIS 11812:2018(E)
Contents Page

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

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

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

3 Terms and definitions ............................................................................................................................ 1

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

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

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

5.2 Requirements for watertight and “quick draining” recesses ............................................................... 6

6 Watertightness requirements ............................................................................................................... 7

6.1 Watertightness requirements for “watertight” recesses ...................................................................... 7

6.2 Watertightness requirements for “quick draining” recesses ............................................................... 7

7 Requirements for companionway sills .................................................................................................. 7

7.1 Companionway sills concerned ............................................................................................................. 7

7.2 Recess with a “reduced risk of flooding” ............................................................................................... 8

7.3 Sill height measurement ........................................................................................................................ 8

7.4 Minimum companionway sill height for “quick draining” recesses..................................................... 9

8 Height of recess bottom above waterline for quick-draining recesses ............................................... 9

9 Quick-draining recesses – Single bottom recesses drainage ................................................................ 9

9.1 Drainage general requirements ............................................................................................................ 9

9.2 Drain requirements .............................................................................................................................. 10

9.2.1 Number and dimensions ...................................................................................................................... 10

9.2.2 Special provisions................................................................................................................................. 10

9.2.3 Installation ............................................................................................................................................ 10

9.3 Drainage calculations requirements ................................................................................................... 11

9.3.1 Drainage calculation principle and assessment methods .................................................................. 11

9.3.2 Simplified drainage assessment method............................................................................................. 12

10 Quick-draining recesses – Multi-bottom recesses drainage ............................................................... 13

10.1 Drainage general requirements .......................................................................................................... 13

10.2 Drainage requirements for foot basin ................................................................................................. 13

11 Owner’s manual — Documentation ..................................................................................................... 15

Annex A (normative) Full calculation method for draining time .................................................................... 16

A.1 Preliminary ........................................................................................................................................... 16

A.2 Procedure for calculation of a single bottom recess ........................................................................... 16

A.3 Equations and detail of calculation for a multiple bottom recess ...................................................... 18

A.4 Dimensions of non-circular drains ...................................................................................................... 19

A.5 Principle of calculation where the drain diameters are different ..................................................... 20

A.6 Determination of minor head loss coefficients K ................................................................................ 20

A.6.1 General .................................................................................................................................................. 20

Annex B (Informative) Examples of draining time calculation for single level and double level bottom

recesses ................................................................................................................................................. 24

B.1 Determination of the required drain diameter by direct calculation or simple method of

clause 10 ............................................................................................................................................... 24

B.2 Examples assessment of recesses with several bottom levels ........................................................... 26

B.2.1 Two bottoms recess without foot basin .............................................................................................. 26

B.2.2 Closed recess with two bottom levels (see Figure B.3 a) ...................................................................... 26

B.2.3 Recess with two level bottom and aft part open (see Figure B.3 b) ..................................................... 27

B.3 Recess with foot basin .......................................................................................................................... 28

B.3.1 Presentation ......................................................................................................................................... 28

Annex C (normative) Watertightness tests ....................................................................................................... 30

© ISO 2018 – All rights reserved iii
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oSIST prEN ISO 11812:2018
ISO/DIS 11812:2018(E)

C.1 General ................................................................................................................................................. 30

C.2 Watertightness tests ............................................................................................................................ 30

C.2.1 Determination of degrees of watertightness and weathertigntness ................................................. 30

C.2.2 Test for “spraytitght” level .................................................................................................................. 31

Annex D (Informative) Technical background ................................................................................................. 33

D.1 Calculations for a single bottom recess .............................................................................................. 33

D.1.1 Calculation for a "perfect" fluid i.e. no viscosity and no head loss .................................................... 34

D.2 Calculation with "real" fluids and head losses ................................................................................... 35

D.2.1 General ................................................................................................................................................. 35

D.3 Calculation of the draining time of a two bottoms recess with "real" fluids and head losses .......... 36

D.3.1 General ................................................................................................................................................. 36

D.3.2 Major (frictional) head losses – For information only ....................................................................... 37

D.3.3 Minor head losses ................................................................................................................................ 37

D.4 Water flow in a foot basin .................................................................................................................... 37

Annex E (Informative) Examples of “quick draining” recesses ..................................................................... 38

Bibliography ..................................................................................................................................................... 40

iv © ISO 2018 – All rights reserved
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oSIST prEN ISO 11812:2018
ISO/DIS 11812:2018(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 second edition cancels and replaces the first edition (ISO 11812:2003), of which it constitutes a

major revision. In this revision, based on 10 years of application, the main changes are:

 introduction of the concept of aft open cockpits;
 clarification of requirements;
 systematic usage of the general term "recess" instead of "cockpit";
 clarification of requirements on engine ventilation ducts in recesses;

 implementation of multi bottom recesses or recesses with a foot-well in the main core of the

standard;

 deletion of "major head losses" (friction in drain pipes) as their effect was very small, but this made

the calculation much more complex;

 improved data for "minor head losses" (local losses) to correspond to common practice;

 reduction of remaining water in the recess from 0,1 m to 0,05 m.
© ISO 2018 – All rights reserved v
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oSIST prEN ISO 11812:2018
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oSIST prEN ISO 11812:2018
DRAFT INTERNATIONAL STANDARD ISO/DIS 11812:2018(E)
Small craft — Watertight or quick draining recesses and cockpits
1 Scope

This International Standard specifies requirements for recesses and cockpits in terms of watertightness,

draining time, and sills in way of cockpit companionway doors or hatches, for small craft up to 24 m

length of hull. Recesses located in elevated part of the craft shall be considered by the scope of this

standard. This standard only considers normal operation of craft, as defined in ISO 8666.

Unattended craft recess issues are considered out of the scope of this standard;

It does not set requirements for the size and the shape of a recess or cockpit, or where it shall be used. It

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

This international standard does not guarantee that the water contained in a watertight or quick draining

recess or cockpit will not harm stability and floatability, which are covered by ISO 12217.

NOTE 1 The term "quick-draining" has been chosen in differentiation from the common understanding of "self-

draining" where water may be drained overboard in certain conditions, but without specified draining speed, height

of bottom or sill, etc.
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 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 12216 Small craft —- Windows, portlights, hatches, deadlights and doors — Strength and tightness

requirements.

ISO 12217 (all parts), Small craft — Stability and buoyancy assessment and categorization.

ISO 12215- Parts 5& 7, Small craft — Stability and buoyancy assessment and categorization.

3 Terms and definitions

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

3.1
design category

description of the sea and wind conditions for which a craft is assessed to be suitable (see ISO 8666)

NOTE 1 to entry: The definitions of these design categories align with those used in the Recreational Craft

Directive of the European Union, EU Directive 2013/53/EC.
© ISO 2018 – All rights reserved 1
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oSIST prEN ISO 11812:2018
ISO/DIS 11812:2018(E)
3.2
sailing craft

craft for which the primary means of propulsion is by wind power, having reference sail area, as defined

2/3

in ISO 12217: A ≥ 0,07(m ) where m is the mass of the craft in the maximum load condition,

S LDC LDC
expressed in kilograms.
3.3
non-sailing craft
craft not designed to use sails as primary means of propulsion
3.4
heeled waterline

the level of the water on the hull in the fully loaded, ready-for-use condition according to ISO 8666 when

the craft is inclined to:
—an angle of 7° for motor boats and sailing multihulls; or

—30° or immersion of the sheerline, whichever occurs first, for monohull sailing boats.

3.5
recess

volume open to the air that may 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: A recess can be composed of several recesses connected together
3.6
cockpit
recess intended for the accommodation of people
3.7
watertight recess

recess which satisfies the requirements of this document for watertightness requirements and sill height,

but not those for drainage
3.8
quick-draining recess

Recess with characteristics and draining capacity which fulfil all the requirements of this International

Standard for one or several design categories

NOTE 1 to entry: According to its characteristics, a recess may be considered quick-draining for one design

category, but not for a higher category.
3.9
recess open to the sea

recess where its aft boundary is open to the outside of the craft with a recess retention height equal to

zero according to 3.21.
NOTE 1 to entry Figure 1 c) gives an example of a recess open to the sea .
2 © ISO 2018 – All rights reserved
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oSIST prEN ISO 11812:2018
ISO/DIS 11812:2018(E)
3.10
recess bottom

the lowest surface of the recess sole where water collects before being drained. The recess bottom may

have several levels

NOTE 1 to entry Devices raising the sole level(s) above the rigid bottom of the cockpit sole, e.g. grating, stands,

bridge decks, are not considered as part of the recess bottom.
3.11
recess bottom height

height of the recess bottom above waterline, the craft being upright, at rest and fully loaded

3.12
minimum recess bottom height
B min
Minimum value of H required by this document
3.13
single bottom recess
recess where the bottom has only one plane
3.14
multi-bottoms recess
recess where the bottom has more than one plane
3.15
bridge deck

area in the proximity of the companionway opening and above recess bottom, on which people normally

step before entering the accommodation
3.16
interior
Inside part of the craft watertight envelope.
3.17
watertightness degree

capacity of an appliance or fitting to resist ingress of water, according to the conditions of exposure to

water.
Definitions of the degrees of watertightness
Table 1 —
Degree of watertightness: Definition
1 (waterproof) Constructed to withstand continuous immersion
Protection against effects of continuous immersion of water

2 (watertight) Constructed to prevent ingress of water when tested according to D.2

Protection against effects of temporary immersion water
3 (weathertight) Constructed to minimize seepage when tested according to D.3
Protection against splashing water
© ISO 2018 – All rights reserved 3
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oSIST prEN ISO 11812:2018
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4 (spraytight) Protection against waterdrops falling at an angle of up to 15° from the

vetrtical
3.18
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 craft, or a recess, apart from those excluded by ISO 12217
3.19
appliance

device made of a plate and its associated framing, opening and fixture systems, if relevant, used to cover

an opening in the hull, deck or superstructure of a craft; that may be fixed or opening (detachable, hinged,

sliding, folding, etc.)

EXAMPLE Windows, portlights, hatches, deadlights, doors, sliding appliances, escape hatches,

washboard.
3.20
fixed appliance
Non-opening appliance
3.21
opening appliance
appliance that can be opened
3.22
recess retention height

height of water in a recess, when the craft is upright and at design trim, at which 20% of the uppermost

periphery of the surrounding coaming (measured in a horizontal plane parallel to waterline) would be

covered by water, assuming that all gates, doors or drainage openings are considered to be sealed, unless

the drainage area is greater than 0,005L B
H H
Note 1 to entry: The design trim is in mLDC condition as defined in ISO 86
...

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