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A Second Officer usually refers to the third in the line of command for a flight crew on a commercial or non-military aircraft. Usually the Second Officer is a flight engineer who is also a licensed pilot. A Second Officer on some airlines is part of a relief crew. Rarely, such relief pilots are called Third Officer. The title derives from the nautical title indicating a third in command officer.

[edit] See also

• Captain (civil aviation)
• First officer
• Third Officer (civil aviation)

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