Altitude

acrophyte ozone sickness bow altitudinal sea level cloud base fog line snow line contour ionosphere mist belt altigram culminant statoscope altitudes angular astrolabe altimetry minimum descent altitude label armstrong line earthquake bomb bird's eye angel flight level rate of climb hold aloft low hypsometer exopause ceilometer noctilucent freezing level height pancake landing grab some air cone vertical levelling staff cross staff universal instrument almucantar ring barometric pressure emory oak flatland tropopause direct flight vertex absolute kanuka tree line altitudinally altimeter buzz rate of climb indicator nimbostratus backstaff satelloid high level a exobase flight line absolute ceiling turbopause tibetan plateau gnomon lapse zero zero fellfield cruise missile kármán line rainbow bomb nuclear airburst guide rope flight envelope acrophilia hop n pop geopotential pressure altimeter rockoon heavenly body midaltitude victor airway boostglide lincoln mountain leader death zone altiplanation ozone layer cirrus look down shoot down paranthelion forestaff critical altitude high up high up type measuring measuring type mountain mountain measurement measurement airplanes how high how measure sky sky measure hill top