Second officer is a military title that was held by many spacefaring civilizations. Aboard Federation starships, the Starfleet second officer is third-in-line for command, and usually fills a department head role in the senior staff, generally holding the rank of lieutenant commander.

Second officersEdit

• Lieutenant Commander Data (USS Enterprise-D, 2364–2371; USS Enterprise-E, 2372–2379)
• Ezri Dax (Deep Space 9, 2376–2380, as lieutenant; USS Aventine, 2380–2381, as lieutenant commander)
• Jadzia Dax (Deep Space 9, 2369-2371, as lieutenant)
• Miranda Kadohata (USS Enterprise-E, from 2380, as lieutenant commander/commander)
• Xintal Linojj: USS Enterprise-B - (2311-?) (as Lieutenant commander)
• Spock: USS Enterprise - (2253-2264) (as Lieutenant); USS Enterprise - (2273) (as Commander)
• Montgomery Scott: USS Enterprise - (2266-2285) (as Lieutenant Commander); USS Enterprise-A - (2287-2293) (as Captain) (often deferred command duties to other ranking commanders aboard)
• Charles Tucker III: Enterprise (NX-01) - (2151-2161) (as Commander)
• Tuvok: USS Voyager - (2371-2377) (as Lieutenant/Lieutenant Commander); USS Titan - (2380- ) (as Commander)
• Worf: Deep Space 9 - (2372-2375) (as Lieutenant commander)

External linkEdit

• Second officer article at Memory Alpha, the wiki for canon Star Trek.