Lieutenant commander

A traditional naval rank, lieutenant commander was once used in the old navies of Earth, among them the United States Navy and the Royal Navy. In these organizations, a Lieutenant Commander was a grade between the ranks of Lieutenant and Commander grades.

By the 22nd century, Lieutenant commander had apparently become defunct and was not used in the Earth Starfleet. A century later, in the early 2260s, Lieutenant Commander was being used by the Starfleet of the United Federation of Planets.

Lieutenant Commanders Ranks
List of Commanders