no aids used approach

obstacle (if explosives used)

wad (used in loading firearms)

used

used cartridge

used liquid

used oil regenerator

used petroleum products

aids

communication and navigation aids (COMNAV)

navigation aids (NAVAIDS)

technical training aids

training aids

visual aids

training aids, device simulations and simulators (TADSS)

aids to shooting

navigation aids deployment group

aircraft integrated data system (AIDS)

aids to navigation (ATON)

electronic aids to navigation

electronic navigation aids

radio aids

shortrange aids

U.S. Aids to Navigation System

aids to navigation

radio navigational aids

angle of approach

approach angle

approach corridor

approach march

approach march formation

approach path

approach road