WCF

WCF

Definition(s)


WCF

Worst-Case Failure. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

WCF

Worst-Case Failure (WCF) means the identified single fault in the DP system resulting in maximum detrimental effect on DP capability as determined through 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 Guidance
WCFDI

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 Guidance
DP System

DP 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 Guidance  

DP 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:
  1. power system;
  2. thruster system; and
  3. DP 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 Guidance
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 Guidance  

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:
  1. computer system/joystick system;
  2. sensor system(s);
  3. control stations and display system (operator panels);
  4. position reference system(s);
  5. associated cabling and cable routeing; and
  6. networks
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance
DP Vessel

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 Guidance  

DP 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 Guidance
DPVAD

DPVAD

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 Guidance  

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 Guidance
DP Operation

DP 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 Guidance  

DP 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 Guidance
DP Control Station

DP 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 Guidance
ASOG

ASOG

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 Guidance
Activity-Specific Operating Guidelines (ASOG)

Activity-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 Guidance  

Activity-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 Guidance
Worst-Case Failure Design Intent (WCFDI)

Worst-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 Guidance  

Worst-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 Guidance
Thruster System

Thruster 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.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

Thruster System

Thruster system means all components and systems necessary to supply the DP system with thrust force and direction. The thruster system includes:
  1. thrusters with drive units and necessary auxiliary systems including piping, cooling, hydraulic, and lubrication systems, etc.;
  2. main propellers and rudders if these are under the control of the DP system;
  3. thruster control system(s);
  4. manual thruster controls; and
  5. associated cabling and cable routeing.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance
Time to Safely Terminate (operations)

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 Guidance  

Time 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 Guidance
Power Management System

Power 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 Guidance  

Power 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 Guidance
Position Keeping

Position 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 Guidance  

Position 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 Guidance
Loss of Position and/or Heading

Loss 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 Guidance  

Loss 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 Guidance
Joystick System

Joystick 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 Guidance  

Joystick 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 Guidance
FMEA Proving Trials

FMEA 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 Guidance

FMEA 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 Guidance
Dynamic Positioning Control System (DP control system)

Dynamic 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
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

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:
  1. computer system/joystick system;
  2. sensor system(s);
  3. control stations and display system (operator panels);
  4. position reference system(s);
  5. associated cabling and cable routeing; and
  6. networks.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance
Dynamically Positioned Vessel (DP vessel)

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 Guidance  

Dynamically 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 Guidance
Dynamic Positioning Verification Acceptance Document (DPVAD)

Dynamic 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 Guidance  

Dynamic 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 Guidance
Dynamic Positioning Operation (DP operation)

Dynamic 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 Guidance  

Dynamic 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 Guidance
Dynamic Positioning Control Station (DP control station)

Dynamic 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 Guidance  

Dynamic 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 Guidance
Consequence Analysis

Consequence 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 Guidance  

Consequence 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 Guidance
Computer System

Computer 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 Guidance  

Computer 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 Guidance
Bus-tie Breaker

Bus-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 Guidance  

Bus-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 Guidance
IMO MSC.1/Circ.1580,

IMO 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 Guidance
Willingness-to-pay

Willingness-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 Guidance
Willingness-to-accept

Willingness-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 Guidance
Vulnerability Assessment

Vulnerability 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 Standards

Vulnerability 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

Vulnerability Assessment

Product or process of identifying physical features or operational attributes that render an entity, asset, system, network, or geographic area susceptible or exposed to hazards. Sample Usage: The team conducted a vulnerability assessment on the ship to determine how it might be exploited or attacked by an adversary. Annotation: Vulnerability assessments can produce comparable estimates of vulnerabilities across a variety of hazards or assets, systems, or networks. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance