A second officer's log was the main log kept by the second officer aboard a starship or station. A second officer could also keep a science log. (TNG: "The Offspring")
Lieutenant Commander Data kept both a second officer's log and a science log while serving as the second officer aboard the USS Enterprise-D. (TNG: "The Defector", "A Matter of Perspective", "The Quality of Life", "Force of Nature")
Positional logs |
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Admiral's log • Captain's log/personal log • Commander's log |
First officer's log/mission journal/personal log • Second officer's log/personal log/science log |
Ambassador's log • Bridge officer's log • Cadet's log • Chief engineer's log/personal log • Communications officer's log • Helmsman's log • Medical officer's log/personal log • Operations officer's log • Science officer's log/personal log • Security chief's log • Tactical officer's log |