Captain Itzak Arrat was a 24th century Starfleet officer, commanding officer of the USS Ticonderoga in the 2360s.
In 2364, Arrat received an order about the testing of the Mark 25 warp sensor from Commodore Toki of the Advanced Tech Division. (TNG: "Conspiracy", okudagram)
This character was only mentioned in writing.
Arrat is among several people in the orders apparently named after characters from the Albedo Anthropomorphics
comic book series. The original Arrat was male.