Recon Craft Theta Beacon

This radio signal transmitted from fallen UFO, is an unintelligible language interrupted by bursts of static. The signal is on a loop, like an automated distress beacon. Thanks in large part to its limited range, a player can easily track the signal to its source. .

See the article of the emitting Alien Crash Site for much more info.

Here you can find an Alien Blaster and 120 Alien cells in front of a dead alien. These are very rare and I think the only other ones can be found at Fort Independence, but there are not many.