ISO 20663:2020

Ships and marine technology - Grab dredger supervisory and control systems

This document specifies the components and structure, general requirements, and functional requirements of grab dredger supervisory and control systems. It is applicable only to the installed components, functions or systems. It covers the design, manufacture and modifications.

Titre manque

General Information

• Status: Published
• Publication Date: 05-Jan-2020
• ICS: 47.020.99 - Other standards related to shipbuilding and marine structures
• Technical Committee: ISO/TC 8 - Ships and marine technology
• Drafting Committee: ISO/TC 8/WG 11 - Dredgers
• Current Stage: 9093 - International Standard confirmed
• Start Date: 17-Sep-2025
• Completion Date: 13-Dec-2025

Overview

ISO 20663:2020 specifies the components, structure, general requirements and functional requirements for grab dredger supervisory and control systems (GD‑SCS). Applicable to installed components, functions and systems, the standard covers design, manufacture and modifications for integrated GD‑SCS installations. The GD‑SCS typically comprises two integrated subsystems: a SCADA (supervisory control and data acquisition) and a DPM (dredging profile monitor).

Key Topics

• Components and structure
  • The GD‑SCS is an integrated system combining SCADA and DPM, connected via wired or wireless networks to collectors, controllers and operator stations located in the control room or operator cabin.
• Operating positions and control modes
  • The system should provide a local operating position and, where required, a remote position.
  • Control modes include manual control (handles/buttons/HMI) and an emergency hard‑wired mode for equipment affecting safety.
• External communication and interfaces
  • Interfaces should include vessel position and heading systems and tide measurement to support accurate dredging guidance.
• Diagnostics and HMI
  • The GD‑SCS must supply diagnostic information for failures such as start/stop control, operating position transfer and control mode shifts.
  • Human‑machine interface (HMI) graphical conventions are defined, including alarm colour levels (e.g., red = danger, yellow = warning), colour usage guidance and brightness adjustments (including a night mode for bridge displays).
• Functional requirements
  • The SCADA must control crane functions, grab open/close and provide emergency stop; it must monitor slew angle, boom angle, dredging depth and grab opening value in real time.
  • The DPM must display the vessel position and heading plus grab bucket position and depth in data and profile views; it should provide configurable interfaces to positioning and tidal receivers.
  • Calibration procedures are specified in principle, for example resetting dredging depth to zero when the bucket touches the water surface and resetting opening value when fully closed.

Applications

ISO 20663:2020 is intended for OEMs, shipyards, system integrators and operators involved in the design, manufacture, integration and modification of grab dredger control systems. Practical benefits include:

• Improved operational safety through formalized control modes and emergency provisions.
• Enhanced situational awareness via integrated SCADA and DPM visualisation (plan/profile views and numeric displays).
• Standardized diagnostics and HMI conventions that support operator training and consistent alarm handling.

Related Standards

• ISO 8384 - Ships and marine technology - Dredgers - Vocabulary (normative reference cited by ISO 20663:2020).
• ISO/IEC Directives - Referenced in the ISO foreword regarding development and editorial rules for international standards.

For implementation, refer to the full ISO 20663:2020 document for normative details and consult national standards bodies for guidance on conformity and national adoption.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20663
First edition
2020-01
Ships and marine technology — Grab
dredger supervisory and control
systems
Reference number
©
ISO 2020
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
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Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms , definitions and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms . 2
4 Components and structure . 2
4.1 Components . 2
4.2 Structure . 2
5 General requirements . 2
5.1 Operating position and control mode . 2
5.1.1 Operating position . 2
5.1.2 Control mode. 2
5.2 External communication . 2
5.3 Diagnostic . 3
5.4 HMI graphics . 3
5.4.1 Alarm level . 3
5.4.2 Conventions on graphic colours . 3
5.4.3 Brightness of the HMI . 3
6 Functional requirements . 4
6.1 SCADA . 4
6.1.1 General description . 4
6.1.2 Pontoon positioning . 4
6.1.3 Crane movement . 4
6.1.4 Grab operation . 4
6.1.5 Calibration of system. 5
6.2 DPM. 5
Foreword
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iso/ forewo
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