Orienteering [training or competitive] in the Army, up to and including Army Team and Individual Championships, is classified as participating in ‘Individual Military Training’.
It is a distinct form of navigation training, usually taking place in rural areas (although camps are also now mapped) where it is possible to navigate freely between control points on foot i.e. not limited to tracks and paths. It can be used as a component of Military Annual Training Test (MATT) 5 – Navigation, a mandatory annual competence test for Army personnel.
Military Orienteering is governed by a Defence Instruction, published annually and available here.
Army orienteers who compete at higher competitive levels, such as Inter Services (Army v Navy v RAF) and UK Armed Forces (UK Armed Forces team v Police/ University) matches are classified as participating in a Category 2 Sport