A navy was the branch military forces principally designated for lake- or ocean-borne combat operations and related functions. Many traditions that originated in the early Earth-based navies were still adhered to by Starfleet in the 23rd century.
- Giving ship commanders equal quarters as admirals. (DS9: "Rapture")
- Keelhauling (referred to as a naval tradition by Odo in jest). (DS9: "Rapture")
- Referring to the commander of a ship, regardless of rank, as "captain" (DS9: "Behind the Lines")