The sensor log is a log recorded by various sensors on starships, space stations, probes and more. The log can be re-examined at a later time. Starfleet Intelligence agents Bridget McLellan and Cervantes Quinn were sent on a mission to the Gorn Hegemony controlled planet of Tzoryp in the year 2268. There, they were instructed to copy the sensor logs from the Orion freighter Treana onto a data card. Before they could complete the mission, the Treana was destroyed by Goloth, a Klingon Imperial Intelligence agent. (VAN - Declassified novella: The Stars Look Down)