Operational base. Dugout used by Auxiliary Units operational patrols and Scout Sections.
Officer Cadet Training Unit
Observation post. Lookout used by Auxiliary Units operational patrols and Scout Sections (usually associated with an OB).
OUTstations formed part of the wireless network commanded by Major RNA Jones of Auxiliary Units Signals (GHQ Home Forces). Every OUTstation consisted of a wireless set operated by a civilian, providing the local INstation with the latest intelligence. See also SDS.