The Thanatok was a Federation Starfleet starship in service in the late 22nd century. It was a cruiser.

The vessel was crewed entirely by Andorians with an overzealous captain. On reference stardate 1/1209.12 (circa 2186), the Thanatok attacked and destroyed an Orion pirate enclave at Brurem. However, a number of civilians were also killed.

The Botchok Planetary Congress protested the civilian deaths, and the Federation punished the Thanatok's captain. (FASA RPG module: The Orions: Book of Common Knowledge)

As an early Starfleet vessel with no "USS" prefix name (these are always included in the source) and an entirely Andorian crew, the Thanatok is likely to be a former Andorian vessel included in the newly formed Starfleet. It may be part of the so-called "Blue Fleet" of Andorian-crewed Starfleet vessels.
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