IMO Performance Standards for Integrated Bridge Systems (IBS) (Resolution MSC.64(67))

What is an Integrated Bridge System?

Integrated-Bridge-System-by-Yaltes
Image Courtesy: Yaltes

An integrated bridge system (IBS) is defined as a combination of systems that are interconnected in order to allow centralized access to sensor information or command/control from workstations, with the aim of increasing safe and efficient ship’s management by suitably qualified personnel.

Adopted in year

The performance standards for integrated bridge systems were adopted by IMO in 1996 (Resolution MSC.64(67))

IMO Performance Standards for Integrated Bridge System

An Integrated Bridge System, In addition to meeting the requirements of IMO Resolution A.694 (17)– General Requirements for Shipborne Radio Equipment Forming Part of the Global Maritime Distress and Safety System (GMDSS) and for Electronic Navigational Aids– (Adopted on 6 November 1991), should comply with the following performance standards.

System Requirement

The Integrated Bridge System should support systems pet forming two or more of the following operations:

  • Passage Execution;
  • Communications;
  • Machinery Control
  • Loading, Discharging and Cargo Control; and
  • Safety and Security

General

Integrated-Bridge-System

General Requirements

  • The IBS should comply with all applicable IMO Requirements and Recommendations. Parts executing multiple operations should meet the requirements specified for each individual function they control, monitor, or perform.
  • Each part/ individual module/ equipment/ sub-system of an Integrated Bridge System should meet the relevant requirements of Resolution A.694 (17) and their associated technical testing standards. In consequence, the IBS is in compliance with these requirements without further environmental testing.
  • A failure of one part should not affect the functionality of other parts except for those functions directly dependent upon the information from the defective part.

Integration

The IBS should provide functional integration meeting the following requirements:

  • The functionality of the Integrated Bridge System should ensure that its operation is at least as effective as for stand-alone equipment.
  • Continuously displayed information should be reduced to the minimum necessary for the safe operation of the ship. Supplementary information should be readily accessible.
  • Where multifunction displays and controls are used to perform functions necessary for the safe operation of the ship they should be duplicated and interchangeable.
  • It should be possible to display the complete system configuration, the available configuration, and the configuration in use.
  • Each part to be integrated should provide details of its operational status and the latency and validity of essential information. Means should be provided within the IBS to make use of this information.
  • An alternative means of operation should be provided for essential functions.
  • An alternative source of essential information should be ‘ provided. The IBS should identify the loss of either source.
  • The source of information (sensor, result of calculation, or manual input) should be displayed continuously or upon request.

Data Exchange

  • Interfacing to an IBS should comply with the relevant international marine interface standards.·
  • The data exchange should be consistent with the safe operation of the ship.
  • The integrity of data flowing on the network should be ensured.
  • A failure in the connectivity should not affect independent functionality.

Failure Analysis

A failure analysis should be performed, documented and be acceptable.

Operational Requirements:

Human Factors

  • An Integrated Bridge System should be capable of being operated by personnel holding appropriate certificates.
  • The Man-Machine Interface (MMI) should be designed to be easily understood and in a consistent style for all integrated functions.
  • Where multifunction displays are used, they should be in color, and continuously displayed information and functional areas, e.g. menus should be presented in a consistent manner.
  • For actions that may cause unintended results, the IBS should request confirmation from the operator.

Functionality

  • It should always be clear, from where essential functions may be performed.
  • The system management should ensure, that one user only has the focus of an input or function at the same time. If so, all other users should be informed about that by the IBS.

Technical Requirements

Sensors

In order to ensure adequate system functionality, the sensors employed should ensure communication compatibility in accordance with the relevant international marine interface standard, and provide information about their operational status and about the latency and validity of essential information.

Alarm Management

  • The IBS Alarm Management, as a minimum, should comply with the requirements of the Code on Alarms and Indicators, 1995 (Resolution A. 830(1 9)).
  • Appropriate alarm management on priority and functional groups should be provided within the IBS.
  • The number of alarm types and their release should be kept as low as possible by providing indications for information of lower importance.
  • Alarms should be displayed so that the reason for the alarm and the resulting functional restrictions can be easily understood. Indications should be self-explanatory.

Power Interruptions and Shut-Down

  • If subjected to an orderly shut-down, the IBS should, upon turn-on, come to an initial default state.
  • After a power interruption, the full functionality of the IBS should be available after recovery 000 of all subsystems. The IBS should not increase the recovery time of individual subsystem functions after power restoration.
  • If subjected to a power interruption the IBS should, upon restoration of power, maintain the configuration in use and continue automated operation, as far as practicable. Safety-related automatic functions should only be restored upon confirmation by the operator.

Power Supply

  • The power supply requirements applying to parts of the IBS as a result of other IMO Requirements should remain applicable.
  • The IBS should be supplied:
    • from the main and emergency sources of electrical power with automated changeover through a local distribution board with provision to preclude inadvertent shut-down;
    • from a transitional source of electrical power for a duration of not less than ONE MINUTE; and
    • where required, parts of the IBS should also be supplied from a reserve source of electrical power