ISO/TR 9814:2025 PDF

Name: ISO/TR 9814:2025 — Ships and marine technology — Good practices of preventing capsizing during turning of ships with large profile height
SKU: ISO/TR 9814:2025
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Ships and marine technology — Good practices of preventing capsizing during turning of ships with large profile height

Название (английский):

ISO/TR 9814:2025

Ships and marine technology — Good practices of preventing capsizing during turning of ships with large profile height

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 31
Дата публикации:: 16 июня 2025 г.
Издание:: ISO TR 9814 edition 1 version 1
ICS:: 47.020.01

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Описание (английский):

This document gives good practices on how to prevent the capsizing of ships with large profile height during turning. The following are covered this document: a) ship turning, centrifugal force, and consequent heeling; b) accident use cases of capsizing during turning; c) effect of the KG on the ship stability; d) three good practices of preventing capsizing during turning of ships.

Abstract

Похожие стандарты

Другие стандарты ISO

Overview

ISO/TR 9814:2025 - Ships and marine technology provides targeted good practices to prevent capsizing of ships with large profile height during turning maneuvers. As a Technical Report, it synthesizes accident analyses and technical guidance rather than imposing prescriptive rules. The report focuses on the dynamic stability risks caused by turning-induced centrifugal force and resultant heeling, and offers three practical mitigation measures based on investigations of five capsizing accidents.

Key Topics

Ship turning, centrifugal force and heeling - explanation of how turning generates lateral loads and heeling moments on high-profile vessels.

Accident case analysis - comparative analysis of five notable capsizing incidents (see Annex A) to extract common causal factors and lessons learned.

Effect of KG on stability and the GZ curve - discussion of the vertical centre of gravity (KG), its influence on the GZ (stability arm) curve, and hull-form characteristics that can produce critical GZ behavior.

Three good practices to reduce capsizing risk:

Semi-automatic inclining tests before loaded departure and procedures for stability screening when full inclining is not performed.
Setting and managing maximum heeling angles during turning, with special considerations for maritime autonomous surface ships (MASS) and cargo slippage.
Precise calculation of Free Surface Moment (FSM), including practical points such as FSM at high filling levels (e.g., 98 %), software limitations (noted issues like slack limits in some commercial tools), and recommended improvements to stability calculation software.

Terms and definitions relevant to large profile-height vessels (profile height, free surface effect, inclining test, FSM, etc.).

Applications

ISO/TR 9814:2025 is intended for professionals involved in the design, operation and regulation of ships with large profile heights, including:

Naval architects and ship designers - to evaluate hull form, KG management and GZ characteristics during design.

Ship operators and masters - to implement pre-departure stability checks (inclining tests or screening), operational limits on turning and cargo securing practices to mitigate heeling and cargo shift.

Classification societies and surveyors - to inform inspections, inclining-test protocols and stability assessments.

Maritime safety regulators and port authorities - to shape guidance, oversight and safety recommendations for area carriers, PCTCs, car carriers, cruise ships and other volume/area carriers.

Developers of onboard automation and MASS systems - to integrate maximum heeling and stability constraints into control and alarm systems (IMACS).

Related standards

SOLAS (International Convention for the Safety of Life at Sea) - overarching safety requirements referenced in industry practice.

ISC (International Code on Intact Stability) - related intact stability criteria and guidance.

ISO/TC 8 (Ships and marine technology), SC 8 - technical committee responsible for ship design standards and guidance.

Keywords: ISO/TR 9814:2025, capsizing prevention, ship stability, profile height, KG, GZ curve, free surface moment, inclining test, centrifugal force, maritime safety.

ISO/TR 9814:2025 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

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