2026-04-07T18:53:40+01:0012,4373415https://marinefinds.org.uk/datalabs/terminology/objects/format/jsonhttps://marinefinds.org.uk/datalabs/terminology/objects/format/xmlhttps://marinefinds.org.uk/datalabs/terminology/objects683290989ACID TOWERYA coke-filled tower used for the dissolving and neutralising of acid produced by alkali-making processes.1P683390990ACID WORKSYA building or site used for the production of acids by a range of chemical processes.1P429768809Acoustic Detection PostN1N683490991Acoustic MirrorN1N683590992Acoustic WallN1N3598138832ACROTERIONYA plinth or pedestal, sometimes decorated, and sometimes supporting statuary, placed at the apex and lower extremity of a pediment.546P10810143457ACTIVE AIR DEFENCE SITENA site equipped for active defensive action against an airborne enemy assault.1P10775143374ACTIVITY CENTREYSite or building constructed or adapted for indoor and/or outdoor leisure and sport activities, for example archery, team-building and "outward-bound" activities based on military training.1P2435137250ADITYA passage, usually horizontal, leading into a mine to allow for access or drainage.546P453069048ADITYHorizontal tunnel opening from the surface used for haulage or access to a mine. It can also be used for drainage.1P11533162713Adit EntranceN1N683690993Adit PortalNUse both terms.1N3924141270ADMINISTRATION BLOCKYA part of a building or complex where administrative duties are undertaken.546P620871542Administration BlockN1N11534162714Administrative OfficeN1N683790994AdmiraltyN1N2143100249Admiralty CollierNUse both terms.143N2144100250Admiralty DrifterNUse both terms.143N2145100251Admiralty LighterNUse both terms.143N2146100252Admiralty NetlayerNUse both terms.143N2147100253Admiralty OilerNUse both terms.143N11413160499ADMIRALTY SIGNAL ESTABLISHMENTYA building or site conducting research into communication techniques for use in the Royal Navy.1P11101152606ADMIRALTY SIGNAL STATIONYA building or site used for naval communications.1P2148100254Admiralty TrawlerNUse both terms.143N2149100255Admiralty TugNUse both terms.143N2150100256ADMIRALTY VESSELYAny vessel which has been hired or impressed for use by the Admiralty.143P2151100257Admiralty WhalerNUse both terms.143N683890995ADMISSION HOSPITALYA separate hospital building, or block of an asylum, where new arrivals were segregated from old inmates for a defined period. This system was developed from the mid-19th century onwards.1P432268834ADULTERINE CASTLEYA castle erected without permission, ie. without a royal licence to crenellate.1P965594039ADVANCED LANDING GROUNDYA temporary airfield in use during the build-up to D-Day. They consisted of a natural earth or grass surface reinforced with wire mesh.1P