Sky Sentinel is an

unmanned aerial vehicle An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without any human pilot, crew, or passengers on board. UAVs are a component of an unmanned aircraft system (UAS), which includes adding a ground-based controlle ...

(UAV)

airship An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from a lifting gas that is less dense than the surrounding air. In early ...

designed for long-duration operation of an automated surveillance platform. The airship flies at altitudes up to and can remain aloft for up to 18 hours. It carries a sensor suite payload of up to . The airship is long and contains of

helium Helium (from el, ἥλιος, helios, lit=sun) is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table. ...

to provide lift. A follow-on model—''Sky Sentinel 2''— is planned to support flying at altitudes up to while remaining aloft for up to 26 hours with a sensor suite.

References

Airships of the United States Unmanned aerial vehicles of the United States {{mil-aviation-stub