Name Acronym Description
Fall restraint

Personal fall protection system that restricts the travel of the user away from potentially hazardous areas. 


Bird faeces. 

Infrastructure manager

An infrastructure manager is the person who is responsible for developing, maintaining, managing or operating an infrastructure. 

Man lock

An airlock that allows workers to pass in and out of spaces with differing air pressures, especially one providing access to and from a tunnel, shaft, or caisson in which the air is compressed. 

Pneumatic caisson

Pneumatic caissons are sealed at the top and filled with compressed air to keep water and mud out at depth. An airlock allows access to the chamber. 

Technical rescue team

Technical rescue teams are those who employ specialist rescue tools and skills. These disciplines include rope rescue, swift-water rescue, confined space rescue, ski rescue, cave rescue, trench/excavation rescue, and building collapse rescue, among others. 

Tunnel-boring machine TBM

A machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. 


The air resistance of a moving object, such as a vessel or a rotating machine part, or the force of the wind on a stationary object. 

Work restraint

Personal fall protection system that restricts the travel of the user away from potentially hazardous areas. 

Biological agents 

Broad term used by industry to refer to both biohazards and biological risks (see biohazards and biological risks)  


Materials found at controlled sites such as laboratories. These materials would fall within the categorisation systems recognised throughout the industry.  

Biological risks 

Materials found outside of controlled sites, such as blood at a road traffic incident.  

Classification, Labelling and Packaging of Substances and Mixtures Regulations  CLP 

Regulations that adopt the United Nations’ Globally Harmonised System (GHS) on classifying and labelling chemicals across all European Union countries, including the UK.  

Detection, Identification and Monitoring   DIM

A suite of Detection Identification and Monitoring equipment provided by the Government to fire and rescue services.  

Detection –the recognition of the presence of a CBRN material.   

Identification – the determination of which CBRN material is present.  

Monitoring – a continuous or periodic process of qualitatively or quantitatively determining the presence or absence of CBRN material.  

Lethal dose  LD50

Amount of a material, given all at once, that causes the death of 50% (one half) of a group of test animals. The LD50 is one way to measure the short-term poisoning potential (acute toxicity) of a material.