ISO 20662:2020

Overview

ISO 20662:2020 - Ships and marine technology: Hopper dredger supervisory and control systems (HD‑SCS) - specifies the components, structure, general requirements, and functional requirements for supervisory and control systems installed on trailing suction hopper dredgers. The standard applies only to installed components, functions or systems and covers design, manufacture and modification of the HD‑SCS.

Key scope notes:

• Applies to on‑board, installed systems only (not optional descriptions of uninstalled equipment).
• Treats the HD‑SCS as an integrated SCADA-type system for dredging operations.
• Prepared by ISO/TC 8 (Ships and marine technology).

Key topics and technical requirements

ISO 20662 structures requirements across components, general requirements and functional requirements. Major technical topics include:

• Components and structure

  • Defines HD‑SCS subsystems: STPM/STWC (suction tube position monitor/winch controller), DSLS (draught and soil loading system), unloading system, dredge pump system, jet water system, and dredge valve system.
  • Recommends a multi‑layer network architecture (equipment layer, process monitoring layer).

• General requirements

  • Operating position and control mode (local/remote, manual/automatic).
  • External communication interfaces and requirements.
  • Diagnostics and fault reporting.
  • Human–Machine Interface (HMI): graphics, alarm levels, colour conventions and brightness.

• Functional requirements

  • Detailed functional behavior and controls for each subsystem (Section 6), e.g.:
    • STPM/STWC: preset positions, operation, controllers, displays, alarms, calibration.
    • DSLS: draught/soil monitoring, overflow and light mixture overboard (LMO) control, alarms, calibration.
    • Unloading, dredge pump, jet water and dredge valve systems: operation, controller/display requirements and alarm handling.

• Normative reference

  • ISO 8384 (Dredgers - Vocabulary) is referenced for terms and definitions used throughout the standard.

Applications and practical value

ISO 20662 provides a consistent baseline for:

• Designing and manufacturing integrated control and supervisory systems for hopper dredgers.
• Upgrading or modifying existing dredger control systems to meet recognized functional and safety criteria.
• Technical procurement specifications and acceptance testing for control system integrators and OEMs.
• Improving operational safety and efficiency in dredging operations by standardizing alarms, HMI, diagnostics and control logic.

Who should use this standard

• Shipyards and naval architects building hopper dredgers
• Control system OEMs, PLC and SCADA integrators
• Dredging contractors and operators implementing or updating onboard systems
• Classification societies and marine surveyors reviewing installations
• Marine systems engineers responsible for design, commissioning and maintenance

Related standards

• ISO 8384 - Ships and marine technology - Dredgers - Vocabulary
• ISO/IEC Directives (editorial rules referenced in the standard)