Plain English Meaning
An aircraft that is approved to be flown by just one pilot, without needing a co-pilot or other required crew.
Full Definition
For the purposes of Center Resource Advisory (CRA) and Traffic Management Advisor (TMA) procedures, an aircraft certificated for operation by a single pilot, with no other crewmember required by its type certificate or by the operating regulation under which the flight is being conducted.
Context Anchor
You may see this term in pilot/controller discussions where air traffic control considers the workload of a military jet pilot who is flying alone.
Why Pilots Care
Determines whether a second pilot is required, which affects flight planning, limits, use, and .