A mission log was a log which recorded the events of a specific mission. In 2367, Data ordered the computer to scan all isolinear chips containing mission logs aboard the Onizuka, but found no discrepancies. (TNG: "The Mind's Eye" ) In 2368, in order to discover a connection between a group of Ullians and cases of unexplained comas, Geordi La Forge searched the Ullians' mission logs; he discovered that when two such cases had occurred in the Epsilon Nel system, Tarmin had been on the Ullian homeworld, so could not be responsible. (TNG: "Violations" )