ISO 20661:2020

Ships and marine technology - Cutter suction dredger supervisory and control systems

This document specifies the components and structure, general requirements, and subsystem functional requirements, of cutter suction 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: 9520 - Withdrawal ballot initiated
• Start Date: 17-Nov-2025
• Completion Date: 17-Nov-2025

Relations

• Consolidated By: ISO/TS 80004-8:2020 - Nanotechnologies - Vocabulary - Part 8: Nanomanufacturing processes
• Effective Date: 06-Jun-2022

Overview

ISO 20661:2020 - Ships and marine technology - Cutter suction dredger supervisory and control systems - defines the components, structure, general requirements and subsystem functional requirements for supervisory and control systems installed on cutter suction dredgers (CSDs). The standard applies to the design, manufacture and modifications of installed systems only and describes an integrated CSD-SCS composed of a SCADA (including a Cutter Control System, CCS) and a Dredging Profile Monitor (DPM).

Key topics and technical requirements

• System architecture and components
  • Defines CSD-SCS structure: integrated SCADA + DPM, or independent systems linked via network.
  • Covers interfaces to heading sensors (gyro), tide receivers and echo sounders.
• Operating positions and control modes
  • Requires local and remote operating positions.
  • Specifies manual and emergency control modes (hardwired emergency controls for safety-critical equipment).
• HMI and visualization
  • Real-time mimic pages for main dredging overview, CCS view, DPM view, dredge pumps, winches, spud systems, production and diagnostics.
  • HMI graphic conventions: alarm colour scheme (e.g., red = highest alarm, yellow = warning), recommended colour tones, and brightness (night mode for bridge screens).
• Diagnostics and alarms
  • Diagnostic requirements include equipment failure, interlocking status, communication and sensor failures.
  • Alarm generation when equipment fails or parameters exceed set limits.
• Calibration and presets
  • Calibration functions for vessel position/heading, cutter depth, and sensor parameters.
  • Preset/setup: dimensions, system control parameters and operator process settings.
• Subsystem functional requirements
  • Detailed functional controls for spud & spud carrier, cutter drive, submersible and inboard dredge pumps, valves, ladder/swing/anchor winches and DPM measurement/metering.

Applications and practical value

• Ensures consistent, safe and interoperable supervisory and control systems for cutter suction dredgers.
• Useful for design and commissioning of dredging control systems, HMI development, SCADA integration and safety verification.
• Helps optimize dredging operations through standardised visualization, diagnostics, presets and measurement interfaces.

Who should use ISO 20661:2020

• Shipbuilders and system integrators
• OEMs of dredge pumps, cutters, winches and sensors
• Dredging contractors and fleet operators
• Naval architects, control system engineers and HMI/SCADA developers
• Classification societies and regulatory authorities reviewing CSD installations

Related standards

• ISO 8384 - Ships and marine technology - Dredgers - Vocabulary (referenced terminology used in ISO 20661:2020)

Keywords: ISO 20661:2020, cutter suction dredger, CSD-SCS, SCADA, DPM, dredging control systems, HMI, cutter system, dredge pump, spud system.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20661
First edition
2020-01
Ships and marine technology — Cutter
suction 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
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below or ISO’s member body in the country of the requester.
ISO copyright office
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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 . 1
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 modes . 2
5.2 External communication . 2
5.3 Diagnostic . 3
5.4 Visualization of the system information . 3
5.5 HMI graphics . 3
5.5.1 Alarm level . 3
5.5.2 Conventions on graphic colours . 4
5.5.3 Brightness of the HMI . 4
5.6 Alarm . 4
5.7 Calibration of system . 4
6 Functional requirements . 5
6.1 Preset/setup. 5
6.2 Spuds and spud carrier system . 5
6.3 Cutter system . 5
6.4 Submersible dredge pump system . 5
6.5 Inboard dredge pumps . 6
6.6 Dredge valves . 6
6.7 Ladder winches . 6
6.8 Swing winches . 6
6.9 Anchor hoisting winches and guy winches . 7
6.10 Dredging profile monitor (DPM) . 7
6.11 Measurement sensor and meter . 7
Foreword
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iv © ISO 2020 – All rights reserved

Introduction
This document describes the supervisory and control system for a number of components, functions
and systems that can, but do not have to, be installed on board of a cutter dredger. It does not prescribe
that all described components, functions and systems need to be installed.
INTERNATIONAL STANDARD ISO 20661:2020(E)
Ships and marine technology — Cutter suction dredger
supervisory and control systems
1 Scope
This document specifies the components and structure, general requirements, and subsystem
functional requirements, of cutter suction dredger supervisory and control systems.
It is applicable only to the installed components, functions or systems. It covers the design, manufacture
and modifications.
2 Normative references
The following referenced documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the
...