unidentified flying object (UFO)

unidentified floating object

accident-free flying / mishap-free flying

mishap-free flying / accident-free flying

low flying aircraft / low-flying aircraft

unidentified (u/i)

unidentified covername

unidentified source (u/i)

unidentified human remains

unidentified radar target

harmless object

pointed object

target object

multi-object phase tracking and ranging (MORTAR)

buried object scanning sonar

amount of traces left by a military object (to be hidden)

military object

Military Object Other Than War

object of military occupation

become the object of international discord

foreign object damage walk

foreign object damage (FOD)

assembly drawing (diagram showing how components of an object fit together) / exploded view

foreign object damage

correlation between the object linear dimensions and wavelength

description of object geometry

description of object geometry in three-dimensional space

determine rapidly the visible areas of irradiated object

effect for inflowing of electromagnetic field over the visible parts of object

electric properties of object and propagation medium for electromagnetic waves

geometric form of illuminated object

irradiated object

object geometry