Glossary
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WCFDI
Definition(s)
WCFDI
Worst-Case Failure Design Intent (WCFDI) means the specified minimum DP system capabilities to be maintained following the worst-case failure. The worst-case failure design intent is used as the basis of the design. This usually relates to the number of thrusters and generators that can simultaneously fail.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP System
Definition(s)
DP System
Dynamic Positioning system. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP System
Dynamic Positioning system (DP system) means the complete installation necessary for dynamically positioning a vessel comprising, but not limited to, the following sub-systems:- power system;
- thruster system; and
- DP control system.
DP Control System
Definition(s)
DP Control System
Dynamic Positioning control system. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP Control System
Dynamic Positioning control system (DP control system) means all control components and systems, hardware and software necessary to dynamically position the vessel. The DP control system consists of the following:- computer system/joystick system;
- sensor system(s);
- control stations and display system (operator panels);
- position reference system(s);
- associated cabling and cable routeing; and
- networks
DP Vessel
Definition(s)
DP Vessel
Dynamically positioned vessel (DP vessel). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP Vessel
Dynamically positioned vessel (DP vessel) means a unit or a vessel which automatically maintains its position and/or heading (fixed location, relative location or predetermined track) by means of thruster force. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDPVAD
Definition(s)
DPVAD
Dynamic Positioning Verification Acceptance Document. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDPVAD
Dynamic Positioning Verification Acceptance Document (DPVAD) means the document issued by the Administration or its Recognized Organization to a DP vessel complying with these Guidelines. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP Operation
Definition(s)
DP Operation
Dynamic Positioning Operation. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP Operation
Dynamic Positioning operation (DP operation) means using the DP system to control at least two degrees of freedom in the horizontal plane automatically. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDP Control Station
Definition(s)
DP Control Station
Dynamic Positioning control station (DP control station) means a workstation designated for DP operations, where necessary information sources, such as indicators, displays, alarm panels, control panels and internal communication systems are installed (this includes: DP control and independent joystick control operator stations, required position reference systems' Human Machine Interface (HMI), manual thruster levers, mode change systems, thruster emergency stops, internal communications). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceASOG
Definition(s)
ASOG
Activity-Specific Operating Guidelines. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceActivity-Specific Operating Guidelines (ASOG)
Definition(s)
Activity-Specific Operating Guidelines (ASOG)
Guidelines on the operational, environmental and equipment performance limits for the location and specific activity.(For drilling operations, the ASOG may be known as the Well-Specific Operating Guidelines(WSOG)). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceActivity-Specific Operating Guidelines (ASOG)
Activity-Specific Operating Guidelines (ASOG) means guidelines on the operational, environmental and equipment performance limits for the location and specific activity. (For drilling operations, the ASOG may be known as the Well-Specific Operating Guidelines (WSOG)). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceWorst-Case Failure Design Intent (WCFDI)
Definition(s)
Worst-Case Failure Design Intent (WCFDI)
The specified minimum DP system capabilities to be maintained following the worst-case failure. The worst-case failure design intent is used as the basis of the design. This usually relates to the number of thrusters and generators that can simultaneously fail.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceWorst-Case Failure Design Intent (WCFDI)
Worst-Case Failure Design Intent (WCFDI) means the specified minimum DP system capabilities to be maintained following the worst-case failure. The worst-case failure design intent is used as the basis of the design. This usually relates to the number of thrusters and generators that can simultaneously fail.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceThruster System
Definition(s)
Thruster System
All components and systems necessary to supply the DP system with thrust force and direction. The thruster system includes:- thrusters with drive units and necessary auxiliary systems including piping, cooling, hydraulic, and lubrication systems, etc.
- main propellers and rudders if these are under the control of the DP system
- thruster control system(s)
- manual thruster controls
- associated cabling and cable routing.
Thruster System
Thruster system means all components and systems necessary to supply the DP system with thrust force and direction. The thruster system includes:- thrusters with drive units and necessary auxiliary systems including piping, cooling, hydraulic, and lubrication systems, etc.;
- main propellers and rudders if these are under the control of the DP system;
- thruster control system(s);
- manual thruster controls; and
- associated cabling and cable routeing.
Time to Safely Terminate (operations)
Definition(s)
Time to Safely Terminate (operations)
The amount of time required in an emergency to safely cease operations of the DP vessel.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceTime to Safely Terminate (operations)
Time to safely terminate (operations) means the amount of time required in an emergency to safely cease operations of the DP vessel.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidancePower Management System
Definition(s)
Power Management System
A system that ensures continuity of electrical supply under all operating conditions.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidancePower Management System
Power management system means a system that ensures continuity of electrical supply under all operating conditions.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidancePosition Keeping
Definition(s)
Position Keeping
Maintaining a desired position and/or heading or track within the normal excursions of the control system and the defined environmental conditions (e.g. wind, waves, current, etc.). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidancePosition Keeping
Position keeping means maintaining a desired position and/or heading or track within the normal excursions of the control system and the defined environmental conditions (e.g. wind, waves, current, etc.) Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceLoss of Position and/or Heading
Definition(s)
Loss of Position and/or Heading
That the vessel's position and/or heading is outside the limits set for carrying out the DP activity in progress.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceLoss of Position and/or Heading
Loss of position and/or heading means that the vessel's position and/or heading is outside the limits set for carrying out the DP activity in progress.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceJoystick System
Definition(s)
Joystick System
A system with centralized manual position control and manual or automatic heading control.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceJoystick System
Joystick system means a system with centralized manual position control and manual or automatic heading control.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceFMEA Proving Trials
Definition(s)
FMEA Proving Trials
FMEA proving trials means the test program for verifying the FMEA.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceFMEA Proving Trials
The test program for verifying the FMEA.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Control System (DP control system)
Definition(s)
Dynamic Positioning Control System (DP control system)
Comprises all control components and systems, hardware and software necessary to dynamically position the vessel. The DP control system consists of the following:- computer system/joystick system
- sensor system(s)
- control stations and display system (operator panels)
- position reference system(s)
- associated cabling and cable routing
- networks
Dynamic Positioning Control System (DP control system)
Dynamic Positioning control system (DP control system) means all control components and systems, hardware and software necessary to dynamically position the vessel. The DP control system consists of the following:- computer system/joystick system;
- sensor system(s);
- control stations and display system (operator panels);
- position reference system(s);
- associated cabling and cable routeing; and
- networks.
Dynamically Positioned Vessel (DP vessel)
Definition(s)
Dynamically Positioned Vessel (DP Vessel)
A unit or a vessel which automatically maintains its position and/or heading (fixed location, relative location or predetermined track) by means of thruster force.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamically Positioned Vessel
Dynamically positioned vessel (DP vessel) means a unit or a vessel which automatically maintains its position and/or heading (fixed location, relative location or predetermined track) by means of thruster force.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Verification Acceptance Document (DPVAD)
Definition(s)
Dynamic Positioning Verification Acceptance Document (DPVAD)
The document issued by the Administration or its Recognized Organization to a DP vessel complying with these Guidelines. (See appendix for model form.). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Verification Acceptance Document (DPVAD)
Dynamic Positioning Verification Acceptance Document (DPVAD) means the document issued by the Administration or its Recognized Organization to a DP vessel complying with these Guidelines. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Operation (DP operation)
Definition(s)
Dynamic Positioning Operation (DP operation)
Using the DP system to control at least two degrees of freedom in the horizontal plane automatically.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Operation
Dynamic Positioning operation (DP operation) means using the DP system to control at least two degrees of freedom in the horizontal plane automatically.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Control Station (DP control station)
Definition(s)
Dynamic Positioning Control Station (DP control station)
A workstation designated for DP operations, where necessary information sources, such as indicators, displays, alarm panels, control panels and internal communication systems are installed (this includes: DP control and independent joystick control operator stations, required position reference systems' Human Machine Interface (HMI), manual thruster levers, mode change systems, thruster emergency stops, internal communications). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceDynamic Positioning Control Station
Dynamic Positioning control station (DP control station) means a workstation designated for DP operations, where necessary information sources, such as indicators, displays, alarm panels, control panels and internal communication systems are installed (this includes: DP control and independent joystick control operator stations, required position reference systems' Human Machine Interface (HMI), manual thruster levers, mode change systems, thruster emergency stops, internal communications). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceConsequence Analysis
Definition(s)
Consequence Analysis
A software function continuously verifying that the vessel will remain in position even if the worst-case failure occurs.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceConsequence Analysis
Consequence analysis means a software function continuously verifying that the vessel will remain in position even if the worst-case failure occurs.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceComputer System
Definition(s)
Computer System
A system consisting of one or more computers and associated hardware, software and their interfaces.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceComputer System
Computer system means a system consisting of one or more computers and associated hardware, software and their interfaces.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceBus-tie Breaker
Definition(s)
Bus-tie Breaker
A device connecting/disconnecting switchboard sections. ("closed bus-tie(s)" means connected). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceBus-tie Breaker
Bus-tie breaker means a device connecting/disconnecting switchboard sections ("closed bus-tie(s)" means connected). Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceIMO MSC.1/Circ.1580,
Definition(s)
IMO MSC.1/Circ.1580,
The maximum uplift force during spud can extraction.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceWillingness-to-pay
Definition(s)
Willingness-to-pay
Amount a person would be willing to pay, sacrifice, or exchange for a benefit. Sample Usage: A survey estimated the public's willingness-to-pay in dollars for new security measures. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory GuidanceWillingness-to-accept
Definition(s)
Willingness-to-accept
Amount a person is willing to accept to forgo a benefit. Sample Usage: Researchers designed a survey to estimate the willingness-to-accept dollar value travelers would require to compensate for time, convenience, and privacy potentially lost under a proposed security measure. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory GuidanceVulnerability Assessment
Definition(s)
Vulnerability Assessment
A product or process of identifying physical features or operational attributes that renders an entity, asset, system, network, or geographic area susceptible or exposed to hazards.
Source: API RP 781 Security Plan Methodology for the Oil and Natural Gas Industries.1st Ed. September 2016. Global StandardsVulnerability Assessment
Product or process of identifying physical features or operational attributes that renders an entity, asset, system, network, or geographic area susceptible or exposed to hazards.
Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards