From the article:
The Defense Advanced Research Projects Agency (DARPA) is testing a drone that can hibernate on the ocean floor for years at a time before being launched to the surface and into the air at the push of a button.
Dubbed Upward Falling Payloads (UFP) program, the project was detailed in a biennial report released last week by DARPA, a US Department of Defense agency.
Read the full article here: GAC-UFP-Sputnik.pdf (1007 downloads)
MORE ABOUT UFP
Read more about UFP here