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Memory Beta, non-canon Star Trek Wiki
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Commanding officer, also known as a C.O. is an officer who has command responsibility for a post - such as an installation, station, or a ship in both the United Earth Starfleet as well as the Federation Starfleet.

For most starship commands, a commanding officer will usually hold the rank of Captain, however this is not always the case. Individuals from the rank of Lieutenant all the way up to Admiral have been known to hold the post of commanding officer.

In 2364 the Bluegill parasites attempted a takeover of Starfleet, which was detected by a number of Starfleet officers. Learning of this possible conspiracy, Captain Jean-Luc Picard had Lt. Commander Data review all Starfleet orders for the past six months. In the course of his review, Data learned that there was among other things an uncustomary shuffling of commanding officers, with these new C.O.'s having frequent contact with the highest levels of Starfleet Command. (TNG episode: "Conspiracy")

Chronology

2151

2154

2245

2246

2250

2263

2264

2270

  • Captain Willard Decker commands the Enterprise during a three-year refit, but never commands her on active duty

2273

  • Admiral Kirk assumes command of the Enterprise during the V'Ger incident

2278

2285

  • Captain Spock commands the Enterprise as a training vessel
  • Admiral Kirk assumes command of the Enterprise to investigate a disturbance at station Regula I
  • The Enterprise is destroyed over the Genesis Planet

2286

2293

  • The Enterprise-A is decommissioned
  • Kirk resigns from Starfleet and buys the Enterprise-A. Soon after, it is destroyed over Chal
  • Starfleet Captain John Harriman takes command of the USS Enterprise-B

2311

2332

2333

2344

2355

  • Captain Picard is victorious at the Battle of Maxia, but the Stargazer is lost

2364

2365

2367

2368

  • Captain Bateson and the USS Bozeman are released from the temporal causality loop

2369

2371

2372

2373

2375

2376

2378

  • Captain Chakotay takes command of Voyager

2379

2381

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