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GB/T 45984-2025: Ships and marine technology - Systems for the detection of persons while going overboard from ships(man overboard detection)
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 45984-2025 | English | 444 |
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Ships and marine technology - Systems for the detection of persons while going overboard from ships(man overboard detection)
| Valid |
GB/T 45984-2025
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Basic data | Standard ID | GB/T 45984-2025 (GB/T45984-2025) | | Description (Translated English) | Ships and marine technology - Systems for the detection of persons while going overboard from ships(man overboard detection) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | U27 | | Classification of International Standard | 47.020.50 | | Word Count Estimation | 22,245 | | Date of Issue | 2025-08-01 | | Date of Implementation | 2026-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 45984-2025: Ships and marine technology - Systems for the detection of persons while going overboard from ships(man overboard detection)
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT45984-2025
ICS 47.020.50
CCSU27
National Standard of the People's Republic of China
Ships and marine technology - Man overboard detection systems
(Man overboard detection)
(ISO 21195.2020, IDT)
Released on August 1, 2025
Implementation on February 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Abbreviations 3
5 Requirements 3
5.1 General Principles 3
5.2 Working Principle 3
5.3 System Description 4
5.4 Control Station 4
5.5 Design and Experiment 4
5.6 MOB Detection 5
5.7 MOB detection area 5
5.8 MOB indication trigger 5
5.9 Visual Indications 5
5.10 Auditory Instructions 6
5.11 MOB Verification Data 6
5.12 MOB Event Operation 6
5.13 MOB Event Information 6
5.14 MOB Event Log 7
5.15 Operating Status 7
5.16 Data Collection 7
5.17 Date and Time Stamp 7
5.18 Data Storage 7
5.19 User Account Type 8
5.20 Access Control 8
5.21 Tamper Protection 8
5.22 Security Log 8
5.23 Compliance with relevant IMO resolutions 8
5.24 MOB test dummy 9
6 Performance requirements in controlled environments 9
6.1 Overview 9
6.2 Basic Detection Probability 9
7 Performance requirements for onboard testing 9
7.1 General 9
7.2 Detection Probability 10
7.3 False Alarm Rate12
7.4 Standby Mode 12
Appendix A (Informative) Recommendation 13
A.1 Overview 13
A.2 Event Marker 13
A.3 Voyage Data Recorder 13
A.4 Bridge alarm management 13
Reference 14
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is equivalent to ISO 21195.2020 "Ships and marine technology — Ship's man overboard detection systems (Man overboard detection)".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed and coordinated by the National Technical Committee for Ship Outfitting Standardization (SAC/TC129).
This document was drafted by. Shanghai Waigaoqiao Shipbuilding Co., Ltd., China State Shipbuilding Corporation Comprehensive Technology and Economic Research Institute, Wison Group
Clean Energy Technology Group Co., Ltd., China Classification Society Shanghai Standards Research Institute, Shanghai Waigaoqiao Shipbuilding and Offshore Engineering Co., Ltd., China Merchants
Bureau Jinling Shipping (Jiangsu) Co., Ltd.
The main drafters of this document are. Chen Gang, Zhou Chunxia, Shen Jianrong, Yu Dongliang, Gu Yajuan, Sun Yaogang, Zhou Ting, Wang Zhangjian, Chen Binyi, Wu Xin,
Yuan Feihui, Wu Jiongdong, Fang Kuikai, Ouyang Tao, Hu Guochao, Chen Jiabin, and Hu Jiexin.
introduction
The lack of standardized requirements for Man Overboard (MOB) detection systems makes it difficult for end users to objectively evaluate the safety and
This document addresses these issues by clearly defining the technical specifications for equipment, enabling manufacturers to develop systems based on uniform requirements.
system and help end users evaluate the safety, effectiveness, performance and reliability of MOB detection systems.
This document provides a method to verify whether the ship's man overboard detection system can be used within the specified environmental window (Table 1) using
5.24 described in the test dummy size, to achieve the required performance operation.
If the system is operated outside the specified range or the test dummy does not conform to the valid human model size, the system performance may be degraded.
Degree of reduction.
Ships and marine technology - Man overboard detection systems
(Man overboard detection)
1 Scope
This document specifies the technical requirements for the Man Overboard Detection System (hereinafter referred to as the MOB Detection System).
This document does not apply to Man Overboard (MOB) detection systems that require passengers or crew to wear or carry devices that trigger a MOB event.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
IEC 60945.2002 Maritime navigation and radiocommunication equipment and systems – General requirements, test methods and required test results
IEC 62288 Maritime navigation and radiocommunication equipment and systems – Display of navigation-related information on shipborne navigation displays – General
IEC 62923 (all parts) Maritime navigation and radiocommunication equipment and systems Bridge alarm management
BoardShips)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
accessible open area accessible open area
An open area facing outboard, accessible to passengers or crew, where a fall would result in the person falling overboard into the water.
3.2
activestate
The MOB detection system is on.
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