Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
E-navigation
Definition(s)
E-navigation
The harmonized collection, integration, exchange, presentation and analysis of marine information on board and ashore by electronic means to enhance berth-to-berth navigation and related services for safety and security at sea and protection of the marine environment. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceData Quality Assurance (DQA)
Definition(s)
Data Quality Assurance (DQA)
A set of processes, that ensures that shore and shipboard based data used by e-navigation systems meets and complies with required quality specifications. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceDQA
Definition(s)
DQA
Data Quality Assurance.
Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceDQA
A set of processes, that ensures that shore and shipboard based data used by e-navigation systems meets and complies with required quality specifications. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceData Quality
Definition(s)
Data Quality
The degree to which quality characteristics of data have the intrinsic potential to satisfy stated and implied needs. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceConditional Probability
Definition(s)
Conditional Probability
Statistical distribution (probability) of the occurrence of a variable A, given that other variables B, C, ... have certain assigned values NOTE The conditional probability of A given that B, C, ... occur is written as P(AIB,C, ... ). The concept is applicable to metocean parameters, as well as to actions and action effects. EXAMPLE When considering wave parameters, A can be the individual crest elevation, B the water depth and C the significant wave height, and so on. Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global StandardsConditional Probability
Conditional probability is the probability of some event A, given the occurrence of some other event B, written as P(A|B). An example is the conditional probability of a person dying (event A), given that they contract the pandemic flu (event B). Sample Usage: An individual has a higher conditional probability of developing a fever if they contract influenza. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory GuidanceNetwork
Definition(s)
Network
Group of persons or components that share information or interact with each other in order to perform a function. Sample Usage: Power plants, substations, and transmission lines constitute a network that creates and distributes electricity. Annotation: Network is used across DHS to explain the joining of physical, cyber, and other entities for a particular purpose or function. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory GuidanceNetwork
System model of pipes and equipment.
Efficiency
Definition(s)
Efficiency
- ratio of the friction for a fluid moving through an ideal pipe to the friction for a fluid moving through an actual pipe
- measure of how well a pump or compressor converts shaft horsepower into pressure and flow. More specifically, efficiency is the ratio of the hydraulic horsepower delivered at the discharge to the actual horsepower supplied to the shaft.
Efficiency
Resources expended in relation to the accuracy and completeness with which users achieve goals. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceEffectiveness
Definition(s)
Effectiveness
Measured in terms of line or vessel balance. With stable flow rate, volume in equals volume out, and an even pack exists throughout. Source: IADC UBO / MPD Glossary, December 2011. Global StandardsEffectiveness
Measure of accuracy and completeness with which users achieve specified goals. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory GuidanceEffectiveness
Extent to which planned activities are realized and planned results achieved. Source: ISO/IEC 27000:2014, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Third Edition, January 2014. Global StandardsDrill
Definition(s)
Drill
Drill means a form of exercise which provides the opportunity to practice elements of the system. Drills are carried out under realistic conditions while allowing for instruction and training, e.g. breathing apparatus drills for the fire team, casualty handling for first aid and stretcher teams, etc. Source: IMO Resolution A.1079(28), Recommendations for the Training and Certification of Personnel on Mobile Offshore Units (MOUs), Adopted on 4 December 2013, International Maritime Organization, Regulatory GuidanceExercise
Definition(s)
Exercise
Exercise means a test of the emergency response arrangements under as near realistic conditions as possible on the MOU and involves all MOU personnel. Source: IMO Resolution A.1079(28), Recommendations for the Training and Certification of Personnel on Mobile Offshore Units (MOUs), Adopted on 4 December 2013, International Maritime Organization, Regulatory GuidanceiaSSO
Definition(s)
SSO
Ship security officer. Source: IMO Resolution A.1079(28), Recommendations for the Training and Certification of Personnel on Mobile Offshore Units (MOUs), Adopted on 4 December 2013, International Maritime Organization, Regulatory GuidanceSecurity Duties
Definition(s)
Security Duties
Security duties include all security tasks and duties as defined by chapter XI-2 of the International Convention for the Safety of Life at Sea (SOLAS 1974, as amended) and the International Ship and Port Facility Security (ISPS) Code. Source: IMO Resolution A.1079(28), Recommendations for the Training and Certification of Personnel on Mobile Offshore Units (MOUs), Adopted on 4 December 2013, International Maritime Organization, Regulatory GuidanceOther Mobile Offshore Unit
Definition(s)
Other Mobile Offshore Unit
Other mobile offshore unit is a MOU which may be involved in any single offshore activity or combination of offshore activities such as:- construction;
- maintenance (including the maintenance of wells);
- lifting operations;
- pipe-laying and related operations;
- emergency/contingency preparedness, including firefighting;
- production systems;
- accommodations;
- storage systems; and
- diving.
- supply vessels;
- standby vessels;
- anchor-handling vessels;
- seismic vessels;
- ship-shape mono hull diving support vessels; and
- special purpose ships.