ISO 20712-3:2020

INTERNATIONAL ISO
STANDARD 20712-3
Third edition
2020-07
Water safety signs and beach safety
flags —
Part 3:
Guidance for use
Signaux de sécurité relatifs à l'eau et drapeaux de sécurité pour les
plages —
Partie 3: Lignes directrices pour l'utilisation
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4  Guidance for selection and siting of signs and flags . 2
4.1 Guidance for risk assessment . 2
4.2 Siting . 3
4.2.1 Water safety signs and multiple signs . 3
4.2.2 Beach safety flags . 3
5 Water safety signs . 3
5.1 General requirements for aquatic environments . 3
5.1.1 General. 3
5.1.2 Mounting height . 4
5.1.3 Lighting . 4
5.1.4 Sign height and maximum viewing distance . 4
5.1.5 Use of supplementary text . 6
5.1.6 Construction: durability and suitability . 6
5.1.7 Servicing and maintenance . 6
5.2 Specific requirements for the swimming pool environment . 6
6  Beach safety flags . 7
6.1 General . 7
6.2 Application of specific beach safety flags . 7
6.2.1 Red flag BF.01 . 7
6.2.2 Yellow flag BF.02 . 7
6.2.3 Red/yellow flag BF.03 . 7
6.2.4 Black/white flag BF.04 . 8
6.2.5 Red/white flag BF.05 . 8
6.2.6 Truncated orange cone . 8
6.3 Materials for beach safety flags . 8
6.4 Operation of flags . 8
6.4.1 Mounting position . 8
6.4.2 Size of flag . 8
6.4.3 Hoisting and taking down of flags. 8
6.5 Flagpole . 9
6.6 Inspection and maintenance of flags and flagpoles . 9
6.7 Storage of flags . 9
7  Multiple signs . 9
7.1 General requirements . 9
7.2 Presentation of information . 9
7.2.1 General. 9
7.2.2 Typeface . 9
7.2.3 Type size . 9
7.2.4 Colour .10
7.2.5 Use of symbols .10
7.2.6 Terminology and language .10
7.3 Types of multiple signs .10
7.3.1 Approach signs .10
7.3.2 Primary access signs .11
7.3.3 Secondary access signs .12
7.3.4 Directional signs .13
8 Tsunami signing system .14
8.1 Planning .14
8.2 Tsunami safety signs and associated safety information signs .14
Annex A (informative) Distance factor z .16
Annex B (informative) Examples of signing swimming pools .17
Annex C (informative) Examples of positioning beach safety flags .19
Annex D (informative) Typeface for text .21
Annex E (informative) Examples of tsunami signing system .23
Bibliography .28
iv © ISO 2020 – All rights reserved

Foreword
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This document was prepared by Technical Committee ISO/TC 145, Graphical symbols, Subcommittee
SC 2, Safety identification, signs, shapes, symbols and colours.
This third edition cancels and replaces the second edition (ISO 20712-3:2014), of which it constitutes a
minor revision. The changes to the previous edition are as follows:
— references to ISO 20712-1 replaced with ISO 7010 as water safety signs with new registration
numbers have been incorporated in ISO 7010;
—
...