For Captain Christopher Pike's First Officer, see Number One.

Number One was an old Earth naval term that was used by captains when referring to their first mates. Like many Earth naval traditions, this term carried forward into Starfleet and is used by many captains toward their XOs.

Among the noted Starfleet captains in the habit of calling their XOs "Number One" were Christopher Pike (TOS episode: "The Cage") and Jean-Luc Picard. (STA novel: Progenitor; TNG episode: "Encounter at Farpoint"; TNG novel: Q & A)

External LinksEdit

• Number one article at Memory Alpha, the wiki for canon Star Trek.
• The British Royal Navy's pages on Navy slang (see "Number")