Spock, first officer of the ISS Enterprise in 2267

In the Imperial Starfleet, the first officer was the second-in-command of a starship. The position was usually held by an officer with the rank of commander or lieutenant commander.

First officer's had the following duties and functions:

  • They were the principal adviser to the captain
  • They implemented the captain's orders
  • They were the commander of the vessel in the event of the captain's absence, incapacitation or death
  • They were to lead assault team missions when the captain presence on the ship was vital
  • They had orders to assassinate the captain in the event of his failing to follow Imperial orders

Some noted first officers in Starfleet history were:

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