ISO 11674-2019 PDF

Full title and description

Ships and marine technology — Heading control systems. This International Standard specifies minimum operational, functional and performance requirements, together with methods of testing and required test results, for heading control (autopilot / steering) systems installed on board ships, taking into account relevant IMO performance standards and bridge alert management considerations.

Abstract

This standard defines requirements and test methods for heading control systems used on ships with conventional propeller and rudder arrangements (speed range up to 30 knots), and gives test conditions and expected results. It addresses operational and functional behavior, performance criteria, failure and alarm handling (including aspects of Bridge Alert Management), and includes provisions intended to be consistent with IMO resolutions referenced in the document.

General information

• Status: Published / Confirmed international standard.
• Publication date: November 2019.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 47.020.70 (Navigation and control equipment, ships and marine technology).
• Edition / version: Edition 3 (ISO 11674:2019).
• Number of pages: 47 (official ISO document pagination).

Key bibliographic and lifecycle details as published by ISO (2019 edition, replaces ISO 11674:2006).

Scope

ISO 11674:2019 specifies the minimum operational, functional and performance requirements for heading control systems installed on board ships and the methods of testing and required test results for those systems. The standard is intended to ensure consistent, measurable performance of steering/heading control systems in service and during type/installation testing. It takes account of related IMO performance standards and bridge alert management guidance and uses ship-model assumptions based on conventional propeller-and-rudder ships (including notes on applicability to vessels with multiple parallel rudders).

Key topics and requirements

• Minimum operational and functional requirements for heading control systems (autopilots, follow-up steering interfaces).
• Performance criteria for course-holding, course-change response and transient behavior under defined testing conditions.
• Methods of testing: simulator ship-models, sea-keeping assumptions, test procedures and pass/fail criteria.
• Alarm and failure handling requirements, including aspects aligned with IMO bridge alert management (BAM) guidance.
• Compatibility notes with related standards and recommendations (references to IEC/IMO requirements used as normative input).
• Notes on applicability to multiple-rudder arrangements and guidance where results from specified model tests are considered valid for similar configurations.

Typical use and users

Used by ship designers, autopilot/steering system manufacturers, shipyards and integrators, classification societies, flag administrations, testing laboratories and ship operators. It is referenced in procurement, type-approval and installation testing to demonstrate compliance with internationally accepted performance and safety expectations for heading control equipment.

Related standards

Normative and informative references include IMO performance standards cited in the standard (for example provisions from IMO resolution MSC.64(67) Annex 3 and related IMO resolutions), IEC maritime equipment standards (for example IEC 60945 where applicable) and the withdrawn earlier edition ISO 11674:2006. Users should consult the normative references listed in ISO 11674:2019 for the full set of related documents.

Keywords

heading control, autopilot, steering system, course keeping, ship navigation equipment, performance testing, bridge alert management, IMO, IEC, maritime.

FAQ

Q: What is this standard?

A: ISO 11674:2019 is an international standard specifying minimum operational, functional and performance requirements and test methods for heading control systems (autopilots/steering) installed on ships.

Q: What does it cover?

A: It covers functional behavior, performance criteria, test methods and expected results for heading control systems, including alarm/failure handling and considerations aligned with IMO bridge alert management; test assumptions are based on conventional propeller-and-rudder ship models (speed up to about 30 knots).

Q: Who typically uses it?

A: System manufacturers, shipyards, ship operators, classification societies, flag administrations and test laboratories use it for design, procurement, type-approval and installation/acceptance testing of heading control systems.

Q: Is it current or superseded?

A: The 2019 edition (ISO 11674:2019, Edition 3) is the current published edition, replacing ISO 11674:2006; the standard is published and confirmed in the ISO lifecycle.

Q: Is it part of a series?

A: It is part of the body of ISO and IEC standards and IMO performance recommendations related to ship navigation and control equipment (maintained under ISO/TC 8/SC 6). While not a numbered series by itself, it is closely linked to related maritime electrical and navigational standards and IMO resolutions.

Q: What are the key keywords?

A: Heading control, autopilot, steering, course keeping, performance testing, bridge alert management, ship navigation equipment.