Clarion spy drone
From Halopedia, the Halo wiki
[verification needed] Template:Ratings
Clarion Spy Drones are small probes that can propel themselves through space under their own power by either remote or computer guidance. They use a variety of sensors and cameras to scan space and transmit data to a any ship, platform, planet, etc. They are standard issue on most UNSC vessels. They are also one of the few things that can survive a Slipspace ejection with no damage as they are almost pure Titanium-A.
They are mainly used for reconnaissance but have a variety of uses, including being used as decoys. Admiral Whitcomb used one of these devices when spying on the Covenant while the Ascendant Justice hid during Operation: FIRST STRIKE.