Unmanned air craft means an airoraft operated A. During search and rescue operations other than publiC. B. Without the possibility of direct human intervention from within or on the aircraft: C. For hobby and recreational use when not certificated.

The correct answer is B. Unmanned aircraft refer to aircraft that are operated without the possibility of direct human intervention from within or on the aircraft. This means that the aircraft is controlled remotely or autonomously, without a pilot on board. Option A is incorrect because unmanned aircraft can be used for various purposes, not just search and rescue operations. Option C is also incorrect because unmanned aircraft can be certificated and used for various purposes, including hobby and recreational use.