ISO 1531:1973
(Main)Fishing nets - Hanging of netting - Basic terms and definitions
Fishing nets - Hanging of netting - Basic terms and definitions
Describes and defines the principal terms "mounting", "hanging", "length of rope", "length of netting" and "hanging ratio E" and gives an example. - Replaces ISO Recommendation R 1531-1970.
Filets de pêche — Armement des nappes de filet — Termes fondamentaux et définitions
General Information
Overview
ISO 1531:1973 specifies basic terms and definitions related to the hanging of netting for fishing nets. The standard clarifies the principal concepts used when mounting netting to a supporting rope or frame and establishes a consistent way to express the relationship between the length of the supporting rope and the length of the netting, using the hanging ratio (E). ISO 1531:1973 replaces ISO Recommendation R 1531-1970 and complements related vocabulary in ISO 1107.
Key Topics
Mounting: Attachment of netting to a supporting rope or frame. The direction of the netting relative to the mounting rope (as per ISO 1107) must be stated precisely.
Hanging: The particular relationship between the length of the final rope or frame section on which the netting is mounted and the length of the netting itself.
Length of rope: The length of the section of rope or frame between the extreme points where the netting is mounted. When used in the hanging ratio calculation the numerator must be expressed in the same units as the denominator and can be measured in mesh lengths.
Length of netting: The dimension of the netting to be mounted that is parallel to the final rope or frame, measured when the netting is fully extended prior to being hung.
Hanging ratio (E): Defined as the ratio of the length of the final rope (numerator) to the length of the netting (denominator):
E = length of rope / length of netting
The ratio may be expressed as a vulgar fraction, a decimal, or a percentage. Example given in the standard: if 10 m of netting is hung on 7 m of rope, E = 7/10 = 0.7 = 70%.
Notes provided in the standard emphasize that any alternative method for calculating percentage must be documented in detail, and that the numerator and denominator must use the same unit of length.
Applications
ISO 1531:1973 is practical for professionals and organizations involved in fishing-net design, manufacture, inspection and regulation. Typical uses include:
- Ensuring consistent specification and communication between designers, manufacturers and clients.
- Standardizing measurement methods for testing, quality control and acceptance checks.
- Supporting regulatory compliance and procurement documentation where precise mounting and hanging definitions are required.
- Assisting technical training and product documentation for netmakers and fisheries engineers.
Related Standards
- ISO 1107 - Fishing nets: netting basic terms and definitions (referenced in ISO 1531 for netting direction and related vocabulary).
- ISO Recommendation R 1531-1970 - The earlier recommendation replaced by ISO 1531:1973.
By adopting the defined terms and the hanging-ratio convention, stakeholders achieve clearer specifications, reproducible measurements, and improved interoperability across fishing-net design and inspection activities.
Frequently Asked Questions
ISO 1531:1973 is a standard published by the International Organization for Standardization (ISO). Its full title is "Fishing nets - Hanging of netting - Basic terms and definitions". This standard covers: Describes and defines the principal terms "mounting", "hanging", "length of rope", "length of netting" and "hanging ratio E" and gives an example. - Replaces ISO Recommendation R 1531-1970.
Describes and defines the principal terms "mounting", "hanging", "length of rope", "length of netting" and "hanging ratio E" and gives an example. - Replaces ISO Recommendation R 1531-1970.
ISO 1531:1973 is classified under the following ICS (International Classification for Standards) categories: 01.040.65 - Agriculture (Vocabularies); 65.150 - Fishing and fish breeding. The ICS classification helps identify the subject area and facilitates finding related standards.
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Standards Content (Sample)
INTERNATIONAL STANDARD 1531
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION 44EXJJYHAPOAHAJI OPTAHH3AUHR I-IO ~AH&WlM3AL1[W~ORGANISATION INTERNATIONALE DE NORMALISATION
Fishing nets -
Hanging of netting - Basic terms and
definitions
First edition - 1973-07-01
UDC 677.66 : 639.2.081.11 Ref. No. IS0 1531-1973 (E)
Descriptors : textiles, nets, fishing nets, suspending (hanging), vocabulary.
Price based on 1 page
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 Member Bodies). The work of developing
International Standards is carried out through IS0 Technical Committees. Every
Member Body interested in a subject for which a Technical Committee has been set
up 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.
Draft lnternationaf Standards adopted by the Technical Committees are circulated
to the Member Bodies for approval before their acceptance as International
Standards by the IS0 Council.
Prior to 1972, the results of the work of the Technical Committees were published
as IS0 Recommendations; these documents are now in the process of being
transformed into International Standards. As part of this process, International
Standard IS0 1531 replaces IS0 Recommendation R 1531-1970 drawn up by
Technical Committee ISO/TC 38, Textiles.
The Member Bodies of the following countries approved the Recommendation :
India South Africa, Rep of
Australia
Iran Spain
Belgium
Sweden
Brazil Israel
Switzerland
Czechoslovakia Japan
Denmark Korea, Rep. of Thailand
Egypt, Arab Rep. of Netherlands Turkey
France Norway United Kingdom
Germany Poland U.S.S.R.
Greece Portugal
Hungary Romania
No Member Body expressed disapproval of the Recommendation.
0 International Organization for Standardization, 1973 l
Printed in Switzerland
INTERNATIONAL STANDARD IS0 1531-1973 (E)
Fishing nets - Hanging of netting - Basic terms and
definitions
1 SCOPE AND FIELD OF APPLICATION 3.5 hanging ratio (symbol E) : The ratio between the
length of final rope (see 3.3) and t
...
NORME INTERNATIONALE
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION #MEXAYHAPOAHAfl OPl-AHM3AIJMR I-I0 CTAHAAPTM3ALU4ki-ORGANISATION INTERNATIONALE DE NORMALISATION
Filets de pêche -
Armement des nappes de filet -
Termes fondamentaux et définitions
Première édition - 1973-07-01
CDU 677.66 : 639.2.081.11 Réf. No : ISO 1531-1973 (F)
Descripteurs : textile, filet, filet de pêche, suspension, vocabulaire.
Prix basé sur 1 page
AVANT-PROPOS
ISO (Organisation Internationale de Normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (Comités Membres 60). L’élaboration de
Normes Internationales est confiée aux Comités Techniques ISO. Chaque Comité
Membre intéressé par une étude a le droit de faire partie du Comité Technique
correspondant. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO, participent également aux travaux.
Les Projets de Normes Internationales adoptés par les Comités Techniques sont
soumis aux Comités Membres pour approbation, avant leur acceptation comme
Normes Internationales par le Conseil de I’ISO.
Avant 1972, les résultats des travaux des Comités Techniques étaient publiés
comme Recommandations ISO; maintenant, ces documents sont en cours de
transformation en Normes Internationales. Compte tenu de cette procédure, la
Norme Internationale ISO 1531 remplace la Recommandation ISO/R 15314970
établie par le Comité Technique ISO/TC 38, Textiles.
Les Comités Membres des pays suivants avaient approuvé la Recommandation :
Afrique du Sud, Rép. d’ Grèce Roumanie
Allemagne Hongrie Royaume-Uni
Australie Inde Suède
Belgique Iran Suisse
Brési I I sraë I Tchécoslovaquie
Corée, Rép. de
Japon Thaïlande
Turquie
Egypte, Rép. arabe d’ Norvège
Danemark Pays-Bas U.R.S.S.
Espagne Pologne
France Portugal
Aucun Comité Membre n’avait désapprouvé la Recommandation.
0 Organisation Internationale de Normalisation, 1973 l
Imprimé en Suisse
ISO 15314973 (F)
NORME INTERNATIONALE
Armement des nappes de filet -
Filets de pêche -
Termes fondamentaux et définitions
3.5 rapport d’armement (symbole E) : Rapport de la
1 OBJET ET DOMAINE D’APPLICATION
longueur du dernier cordage (voir 3.3) à la longueur de
La présente Norme Internationale spécifie les principaux
nappe de filet (voir 3.4), calculé comme suit :
termes re
...
NORME INTERNATIONALE
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION #MEXAYHAPOAHAfl OPl-AHM3AIJMR I-I0 CTAHAAPTM3ALU4ki-ORGANISATION INTERNATIONALE DE NORMALISATION
Filets de pêche -
Armement des nappes de filet -
Termes fondamentaux et définitions
Première édition - 1973-07-01
CDU 677.66 : 639.2.081.11 Réf. No : ISO 1531-1973 (F)
Descripteurs : textile, filet, filet de pêche, suspension, vocabulaire.
Prix basé sur 1 page
AVANT-PROPOS
ISO (Organisation Internationale de Normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (Comités Membres 60). L’élaboration de
Normes Internationales est confiée aux Comités Techniques ISO. Chaque Comité
Membre intéressé par une étude a le droit de faire partie du Comité Technique
correspondant. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO, participent également aux travaux.
Les Projets de Normes Internationales adoptés par les Comités Techniques sont
soumis aux Comités Membres pour approbation, avant leur acceptation comme
Normes Internationales par le Conseil de I’ISO.
Avant 1972, les résultats des travaux des Comités Techniques étaient publiés
comme Recommandations ISO; maintenant, ces documents sont en cours de
transformation en Normes Internationales. Compte tenu de cette procédure, la
Norme Internationale ISO 1531 remplace la Recommandation ISO/R 15314970
établie par le Comité Technique ISO/TC 38, Textiles.
Les Comités Membres des pays suivants avaient approuvé la Recommandation :
Afrique du Sud, Rép. d’ Grèce Roumanie
Allemagne Hongrie Royaume-Uni
Australie Inde Suède
Belgique Iran Suisse
Brési I I sraë I Tchécoslovaquie
Corée, Rép. de
Japon Thaïlande
Turquie
Egypte, Rép. arabe d’ Norvège
Danemark Pays-Bas U.R.S.S.
Espagne Pologne
France Portugal
Aucun Comité Membre n’avait désapprouvé la Recommandation.
0 Organisation Internationale de Normalisation, 1973 l
Imprimé en Suisse
ISO 15314973 (F)
NORME INTERNATIONALE
Armement des nappes de filet -
Filets de pêche -
Termes fondamentaux et définitions
3.5 rapport d’armement (symbole E) : Rapport de la
1 OBJET ET DOMAINE D’APPLICATION
longueur du dernier cordage (voir 3.3) à la longueur de
La présente Norme Internationale spécifie les principaux
nappe de filet (voir 3.4), calculé comme suit :
termes re
...












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