Name | Acronym | Description | |
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Inverter | An inverter (or power inverter) is an electronic device or circuitry that changes direct current (DC) to alternating current (AC) or vice versa |
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Ionisation | The process by which a neutral atom or molecule acquires or loses an electric charge. The production of ions. |
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Ionising radiation | Radiation that produces ionisation in matter. |
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Irradiation | An event where matter has been externally subjected to ionising radiation. |
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Jaw thrust | A professional technique used on a casualty, especially if there is suspected spinal injury, to open their airway |
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Joint Decision Model | JDM | A decision model presented within the JESIP joint Doctrine and used to make analytical decisions |
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Joint Dynamic Hazard Assessment | JDHA | An assessment of risk taking into account the requirements of all emergency response organisations present at an incident |
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Joint Service Co-ordination Group | Military body responsible for formal liaison (civil-military and tri-Service) within an Army Regional Brigades area |
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Ladder fuel | Fuels that provide vertical continuity that allow fire to move through the vertical fuel arrangement |
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Laminar flow | The fastest water travelling with no restrictions in a straight line down a river |
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Last known position | LKP | During a search, clues will be gathered about the person. Occasionally, the clue will be solid enough to be reasonably certain the search subject left it. Since the LKP is more recent than the PLS, this provides a new starting point for the search. |
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Leachate | This is any liquid that, in the course of passing through matter, extracts soluble or suspended solids or any other material through which it has passed. |
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Lifeboat Operations Manager | Person with overall responsibility for a RNLI lifeboat station |
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Line blocked | This is a rail term for the line being blocked and is a stronger term than requesting trains to be stopped. |
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Loadmaster | Member of the aircrew (civilian or military) who is in charge of planning and distributing cargo and passengers on an aircraft |
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Local emergency planning groups | Known as: |
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Lower explosive limit | LEL | Lower explosive limit is the lowest concentration of vapour/gas in air at a given pressure and temperature that will propagate a flame when exposed to an ignition source. |
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Major Accident Hazard Pipeline(s) | MAH pipelines; MAHP(s) |
Supply systems for dangerous fluids as defined in schedule 2 of Pipeline Safety Regulations, which include high pressure natural gas, other gases, oils and chemicals |
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Machine-made mineral fibres | MMMF | A wide range of materials that use the inherent strength and durability of woven fibres bonded together with resins. Previously known as Man-made mineral fibres |
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Manual in-line stabilisation | Maintaining the head and neck of an unconscious casualty in neutral alignment |
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Marine Response Centre | MRC | Maritime and Coastguard Agency co-ordination centre for oil pollution incidents at sea that require a national response |
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Maritime Incident Response Group | MIRG | Specialist fire and rescue service teams strategically located around the country, for response to emergencies at sea |
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Maritime Patrol Aircraft | MPA | Long range military aircraft for detecting, locating, tracking, observing and, if necessary, attacking surface vessels and submarines |
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Maritime Rescue Co- ordination Centre | MRCC | Her Majestys Coastguard regional centre overseeing and co-ordinating the search and rescue operations within a region |
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Maritime Rescue Sub Centre | Her Majestys Coastguard unit subordinate to a Maritime Rescue Coordination Centre |