air-navigation aid

navigational aid (NAVAIDs); aid to navigation (ATON)

junction aid (obstruction aid)

obstruction aid (junction aid)

aid to navigation (ATON)

floating aid to navigation

primary aid to navigation

position and navigation unit / position navigation unit (PNU)

technical work program in the air navigation field (TWPANF)

Special Committee on Future Air Navigation Systems

tactical air navigation system

air navigation

air navigation charge

air navigation commission

Air Navigation committee

air navigation services economic panel

air-navigation chart

International Sanitary Convention for Air Navigation

Technical Work Program in the Air Navigation Field

radar air-navigation chart

Air Force navigation school

TACtical Air Navigation (TACAN)

aid agency

aid man section

aid station

aid worker

battalion aid station (BAS)

buddy aid

comprehensive aid

disaster aid / relief

emergency aid

first aid facility

first aid kit