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
TTAC

TTAC

Definition(s)

TTAC

Tubing to annulus communication .

Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards
MMV

MMV

Definition(s)

MMV

Manual Master Valve.

Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards

D&W

D&W

Definition(s)

D&W

Drilling & Well. Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards
CDRS

CDRS

Definition(s)

CDRS

Common Data Reporting System (NPD/PSA database). Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards
Well Integrity Incident

Well Integrity Incident

Definition(s)

Well Integrity Incident

A well integrity incident is defined as a failure of barrier(s) or failure to activate barrier(s), resulting in an unintentional flow, leak or release of fluids to the environment or other formations.

Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards
Well Control Incident

Well Control Incident

Definition(s)

Well Control Incident

A well control incident is in drilling & completion and live well intervention defined as a failure of barrier(s) or failure to activate barrier(s), resulting in an unintentional1 flow of formation fluid –
  1. into the well
  2. into another formation or
  3. to the external environment.
  1. A planned flow is not a well control incident (for instance DST, mini DST etc.).
Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards
Worst-Case Failure (WCF)

Worst-Case Failure (WCF)

Definition(s)

Worst Case Failure

Design intent refer to the minimum remaining capacity after any relevant single failure or common cause (for a given operational mode). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards  

Worst-Case Failure (WCF)

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  

Worst-Case Failure (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
Redundancy Design Intent

Redundancy Design Intent

Definition(s)

Redundancy Design Intent

High level description of systems and components distribution into redundant groups (e.g. narrative description of both the normal operation mode and the failed operation mode). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Product Certificate (PC)

Product Certificate (PC)

Definition(s)

Product Certificate (PC)

A compliance document validated and signed by the issuing organization: -identifying the product that the certificate applies to -confirming compliance with referred requirements. It is required that: -The tests and inspections have been performed on the certified product itself, or on samples taken from the certified product itself. -The tests were witnessed by a qualified representative of the organization issuing the certificate, or his authorized representative (see DNVGL-RU-SHIP Pt.1 Ch.3 Sec.5). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Manned Personnel Transfer

Manned Personnel Transfer

Definition(s)

Manned Personnel Transfer

Engineered/marine personnel transferring operation (over a gangway) of short duration (usually less than 4 hours) covered by specific operational procedures personnel transfer procedure document describing in detail all phases of the personnel transferring operation.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards

Landing and Transfer Coordinator

Landing and Transfer Coordinator

Definition(s)

Landing and Transfer Coordinator

Person in charge of the engineered personnel transferring operation, ensures that all aspects of the personnel transferring operation are according to the DNV GL approved personnel transfer procedure, shall possess a thorough knowledge and have experience with the actual operation live load (LL) for marking purposes, it shall represent allowable number of persons on the gangway at one moment.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards

Inspection Certificate 3.2

Inspection Certificate 3.2

Definition(s)

Inspection Certificate 3.2

A document prepared by both the manufacturer's authorized inspection representative, independent of the manufacturing department, and either the purchaser's authorized representative or the inspector designated by the official regulations and in which they declare that the products supplied are in compliance with the requirements of the order and in which tests results are supplied, see EN 10204 and ISO 10474.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards

Inspection Certificate 3.1

Inspection Certificate 3.1

Definition(s)

Inspection Certificate 3.1

A document issued by the manufacturer which contains the results of all the required tests It shall certify that the tests have been carried out by the manufacturer on samples taken from the delivered products direct, see EN 10204 and ISO 10474.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Gangway Axis

Gangway Axis

Definition(s)

Gangway Axis

  • X axis: principal axis oriented along the length of the gangway.
  • Y axis: secondary axis, perpendicular to X axis, oriented across the length of the gangway and in the floor/walkway plane.
  • Z axis: secondary axis, perpendicular to the plane defined by X and Y axis.
Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Gangway (assembly)

Gangway (assembly)

Definition(s)

Gangway (assembly)

System intended to transfer personnel and cargo between 2 offshore vessels, typically including a bridge and a pedestal.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Fail-passive

Fail-passive

Definition(s)

Fail-passive

A system that loses partly or completely its functionality (e.g. to actively motion compensate) in case of control system single failure The system can still be manually controlled.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Fail-operational

Fail-operational

Definition(s)

Fail-operational

A system that continues to operate (e.g. to actively motion compensate) in case of a single failure in the control system. Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards