above mean sea level (AMSL)

above sea level (ASL)

elevation above sea level

mean sea level

mean sea level (MSL)

Height Above Ellipsoid (HAE); altitude / elevation above the ellipsoid (ellipsoidal height)

above field level (AFL)

above aerodrome level (AAA)

above ground level (AGL)

altitude above ground level

sea drogue (see Sea Anchor)

sea-to-sea missile

sea level (SL)

sea level atmospheric pressure

sea level pressure

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

surveyor's level (surveying level, tbc)

above water warfare officer

echelon above corps (EAC)

echelon above brigade (EAB)

hull above fender

data above voice

height above ground

above-ground launch

above-ground missile emplacement

above-ground structure

above-water craft

fly above the weather

above the takeoff altitude (AToA)

flying altitude above ground

above-ground storage

Any signal above this point

Current altitude (flashes when above alarm threshold)