Final answer:
In aviation, crews will not land at Robins AFB when thunderstorms are within 5 nautical miles and lightning is observed within 10 nautical miles.
Step-by-step explanation:
The subject of this question pertains to aviation, specifically the operating procedures for aircraft during adverse weather conditions. When determining whether an aircraft can land at a given base like Robins AFB, crews assess weather criteria closely. Crews will not land at Robins AFB when there are thunderstorms within 5 nautical miles of the airfield and lightning has been observed within 10 nautical miles.
These safety precautions are put in place to protect aircraft and crew from lightning strikes and the severe turbulence often associated with thunderstorms. In this context, the subject of the question is Social Studies because it is discussing the criteria for landing at Robins AFB, which is an Air Force Base located in the state of Georgia, USA. Social Studies covers various aspects of geography, including understanding weather patterns and their impact on activities and decisions.