airplane..bwahahahaha....
The Blackbird
The F-117 Nighthawk cannot be detected by radar.
The radar detected incoming aircraft.
Strategic Reconnaissance.
Radar.
A radar
No it just flew very high to avoid radar.
Aerial reconnaissance and radar.
RADAR
Submarines will retreat to the depths if they are detected by radar. Note that radar can only detect a submarine if they are on the surface or if they have a mast or periscope sticking up out of the water. Radar has a terrible time trying to penetrate water, so if a submarine is detected because something is sticking up out of the water, the submarine will submerge to get some depth. Radar can't detect it down there. Also, the submarine will be trying to get out of the area and become "lost" in the ocean where it cannot be detected or located.
radar