ISO 21851:2020

INTERNATIONAL ISO
STANDARD 21851
First edition
2020-08
Marine technology — Ocean
observation systems — Design criteria
of ocean hydro-meteorological
observation systems reuse and
interaction
Technologie maritime — Systèmes d'observation des océans —
Critères de conception de la réutilisation et de l'interaction des
systèmes d'observation hydrométéorologique des océans
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, and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms . 2
4 System architecture, workflow and types of interfaces . 2
4.1 Architecture . 2
4.1.1 General. 2
4.1.2 Function module . 4
4.1.3 Standardized interface . 4
4.1.4 Registration centre . . 4
4.2 Workflow . 6
4.3 Type of interfaces — MQ and REST . 7
4.3.1 MQ . 7
4.3.2 REST . 7
5 Attribute description and observation elements . 7
5.1 Attribute description . 7
5.1.1 General. 7
5.1.2 OHM-CVI description . 7
5.1.3 Instrument description . 8
5.1.4 Parameter description . 9
5.2 Observation elements . 9
5.2.1 General. 9
5.2.2 Hydrologic data . 9
5.2.3 Meteorological data .10
6 Function module .10
6.1 Data storage .10
6.2 Platform navigation .10
6.3 Instrument status display .11
6.4 Data display .11
6.5 Graphic display .11
6.6 Comprehensive query .12
6.7 Statistic analysis .12
6.8 Data export .13
6.9 Print management .14
6.10 Console management .14
6.11 Error and logging .14
7 Data interfaces .14
7.1 Transmitted data format .14
7.2 Input interfaces .15
7.2.1 Data input interfaces .15
7.2.2 OHM-CVI interaction .18
7.3 Output interfaces .18
7.3.1 General.18
7.3.2 Observation data output interface .18
7.3.3 Instrument status output interface.19
8 Exception .20
8.1 General .20
8.2 Response for an exception .21
Annex A (informative) Example of OHM-CVI description file .22
Bibliography .24
iv © ISO 2020 – All rights reserved

Foreword
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electrotechnical standardization.
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 13, Marine technology.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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Introduction
Ocean hydro-meteorological observation is an important means for human cognition and research on
the ocean. It plays an important role in the study of ocean science, protection of the ocean environment,
early warning of ocean disasters, and development of ocean resources. Observation activities are
coordinated by ocean hydro-meteorological observation systems at observing sites. The observation
system is responsible for receiving, storing, displaying, processing and analyzing ocean hydro-
meteorological data, providing software support for accurate and efficient observation activities.
The lack of design standards for ocean hydro-meteorological observation systems leads to different
system structures, poor interface versatility, and diverse data types, which seriously affects the
reusability and interactivity of the system, and brings a series of comprehensive pro
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