The USS Unicorn (NCC-85117) was a 24th century Federation starship operated by Starfleet.

In 2364, this ship received an order from Admiral Gregory Quinn of Starfleet Operational Support Services.

At the end of that year, Lieutenant Commander Data read these orders and several others to investigate claims of a conspiracy among the highest members of Starfleet Command. (TNG: "Conspiracy", okudagram)

This starship was only mentioned in writing.
The star chart seen on this mission order could be seen on the mission order for the USS Endeavour. This chart was first seen in "Heart of Glory" aboard the Talarian freighter Batris. It was seen again in "Symbiosis" aboard the Ornaran freighter Sanction.
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