Lieutenant commander is a military rank, which has an equivalent rank used in the service organizations of many cultures.
Earth History Edit
This rank was used as a naval rank by the early navies of Earth including the United States Navy and the Royal Navy. In these organizations it was between the ranks of lieutenant and commander and was equal to that of major in infantry units.
Use in Starfleet Edit
In the 24th century it was still a ranmk with equivalents in the Cardassian Union (glinn) and the Romulan Star Empire (centurion). Lieutenant commanders normally serve as senior department heads, the first officer aboard smaller vessels, ans sometimes as the commanding officer of a starship. Jadzia Dax, Tom Markel, and Piersall all held positions as commanding officers while holding the rank of lieutenant commander.
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