SIST EN ISO 11812:2024

SLOVENSKI STANDARD
oSIST prEN ISO 11812:2023
01-september-2023
Nadomešča:
SIST EN ISO 11812:2018
Mala plovila - Vodotesni prostori ter prostori in kabine s hitrim odvajanjem vode
(ISO 11812:2020)
Small craft - Watertight or quick-draining recesses and cockpits (ISO 11812:2020)
Kleine Wasserfahrzeuge - Wasserdichte und schnell-lenzende Rezesse und Plichten
(ISO 11812:2020)
Petits navires - Cavités et cockpits étanches ou rapidement autovideurs (ISO
11812:2020)
Ta slovenski standard je istoveten z: prEN ISO 11812
ICS:
47.080 Čolni Small craft
oSIST prEN ISO 11812:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 11812:2023
oSIST prEN ISO 11812:2023
INTERNATIONAL ISO
STANDARD 11812
Second edition
2020-07
Small craft — Watertight or quick-
draining recesses and cockpits
Petits navires — Cavités et cockpits étanches ou rapidement
autovideurs
Reference number
ISO 11812:2020(E)
©
ISO 2020
oSIST prEN ISO 11812:2023
ISO 11812:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2020 – All rights reserved

oSIST prEN ISO 11812:2023
ISO 11812:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 5
5 General . 6
5.1 Loading and measurement conditions . 6
5.2 Requirements for watertight and quick-draining recesses . 6
6 Watertightness requirements. 6
6.1 Watertightness requirements for watertight recesses . 6
6.2 Watertightness requirements for quick-draining recesses . 7
7 Requirements for companionway sills . 7
7.1 Companionway sills . 7
7.2 Quick-draining recess with a reduced risk of flooding . 8
7.3 Sill height measurement . 8
7.4 Minimum companionway sill height for quick-draining recesses . 8
8 Height of recess bottom above waterline for quick-draining recesses .8
9 Quick-draining recesses — Single bottom recess drainage . 9
9.1 Drainage general requirements . 9
9.2 Drain requirements . 9
9.2.1 Number and dimensions . 9
9.2.2 Special provisions . 9
9.2.3 Installation .10
9.3 Drainage calculation requirements .10
9.3.1 Drainage calculation principle and assessment methods .10
9.3.2 Simplified drainage assessment method .11
10 Quick-draining recesses — Multi-bottom recess drainage .12
10.1 Drainage general requirements .12
10.2 Drainage calculations .12
10.3 Drainage requirements for a foot basin .13
11 Owner’s manual.14
11.1 General recommendation for use .14
11.2 Recommendation for use from Table 4 — Companionway opening .14
Annex A (normative) Full calculation method for draining time .16
Annex B (informative) Technical background — Source of the calculations used .24
Annex C (informative) Examples of “quick-draining” recesses .30
Bibliography .32
oSIST prEN ISO 11812:2023
ISO 11812:2020(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 of the voluntary nature of standards, 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 Foreword - Supplementary information.
This document was prepared by Technical Committee ISO/TC 188, Small craft.
This second edition cancels and replaces the first edition (ISO 11812:2001), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— systematic usage of the general term "recess" instead of "cockpit";
— introduction of the concept of recess open to the sea and recess with reduced risk of flooding;
— clarification of requirements;
— clarification of requirements on engine ventilation openings installed in recesses;
— implementation of multi-bottom recesses or recesses with a foot-basin 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;
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

oSIST prEN ISO 11812:2023
INTERNATIONAL STANDARD ISO 11812:2020(E)
Small craft — Watertight or quick-draining recesses and
cockpits
1 Scope
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
1)
ISO 8666:2016 , Small craft — Principal data
1)
ISO 9093-1:1994 , Small craft — Seacocks and through-hull fittings — Part 1: Metallic
1)
ISO 9093-2:2002 , Small craft — Seacocks and through-hull fittings — Part 2: Non-metallic
ISO 12216:2020, Small craft — Windows, portlights, hatches, deadlights and doors — Strength and
watertightness requirements
ISO 12217-1:2015, Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-
sailing boats of hull length greater than or equal to 6 m
ISO 12217-2:2015, Small craft — Stability and buoyancy assessment and categorization — Part 2: Sailing
boats of hull length greater than or equal to 6 m
ISO 12217-3:2015, Small craft — Stability and buoyancy assessment and categorization — Part 3: Boats of
hull length less than 6 m
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
1) Under revision.
oSIST prEN ISO 11812:2023
ISO 11812:2020(E)
3.1
design category
description of the sea and wind conditions for which a craft is assessed to be suitable
Note 1 to entry: The design categories are defined in ISO 12217 (all parts):2015.
Note 2 to entry: The definitions of design categories are in line with the European Recreational Craft Directive
2013/53/EU.
3.2
sailing craft
craft for which the primary means of propulsion is by wind power, having a reference sail area
2/3
A ≥ 0,07(m ) , expressed in metres squared, where m is the mass of the craft in the maximum
S LDC LDC
load condition, expressed in kilograms
Note 1 to entry: The reference sail area, A , is defined in ISO 8666:2016.
s
3.3
non-sailing craft
craft for which the primary means of propulsion is other than by wind power, having a refere
...