A transporter log was a log that recorded transporter activity. In addition to the comings and goings of individuals, these also contained technical information such as biofilter readings.

In 2365, Captain Taggert attempted to obtain a transporter log for Doctor Katherine Pulaski from Captain Jean-Luc Picard, but none existed due to Pulaski's transporter phobia. (TNG: "Unnatural Selection")

In 2368, when a number of individuals on the USS Enterprise-D fell into unexplained comas, Lieutenant commander Geordi La Forge checked the biofilter readings from the log of the visiting Ullian's transport to see if they might be carrying some harmful organism. (TNG: "Violations")

When Harry Kim disappeared from an asteroid and only Chakotay and B'Elanna Torres were beamed back aboard Voyager, Seska checked the transporter log. (VOY: "Emanations")

In 2372, when Captain Benjamin Sisko explained the nature of Red Squad to Constable Odo, the explanation helped Odo to make sense of a transporter log that indicated that Red Squad had beamed back to Starfleet Academy 26 minutes after a state of emergency was declared on Earth. (DS9: "Paradise Lost")

When the USS Defiant was thrown back in time from 2373 to 2268, Arne Darvin escaped to Deep Space Station K-7. Before beaming out, he wiped the transporter logs, preventing the crew from tracking him. (DS9: "Trials and Tribble-ations")

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