aerodrome meteorological observing systems study group

study group on aerodrome surface wind measurement requirements

aerodrome meteorological office

working group on meteorological services to be provided to international general aviation

accident data reporting study group

safety oversight study group

aeronautical data modeling study group

aeronautical information and charts study group

aircraft classification number study group (ACNSG)

aircraft type designation study group

airport design study group

automatic air reporting study group

aviation medicine study group on cardiovascular requirements

aviation medicine study group on visual requirements

aviation security study group

elimination of ambiguity in radiotelephony call signs study group

engine reliability monitoring study group

hazards at accident sites study group

Study Group

study group on aircraft accidents in private aviation

study group on all-freight services in Europe

study group on automatic dependent surveillance

study group on certificates of airworthiness multilateral agreement

study group on market-based options for emissions reduction

study group on the economics of noise restrictions

study group on unmanned free balloons

Joint Advisory Study Group

space-based observing system

observing ammunition

observing angle

observing detail

observing interval

observing line