Final answer:
To remain VFR with a 1,000 feet overcast ceiling and 3 miles visibility, an aircraft must adhere to altitude and visibility requirements, which may differ by region and often require special VFR clearance for circuit operations.
Step-by-step explanation:
When the reported ceiling is 1,000 feet overcast and visibility is 3 miles, to remain VFR (Visual Flight Rules), an aircraft cleared to circuit must maintain situational awareness of the weather conditions and adhere to specific altitude and visibility requirements to ensure safety. In the United States, for example, to remain VFR in controlled airspace, an aircraft must stay clear of clouds and maintain a certain visibility depending on the airspace class. In these conditions, particularly with a ceiling of 1,000 feet overcast, standard VFR regulation would not allow for pattern work at many airports without special VFR clearance, which must be requested and granted by air traffic control. Always check local regulations and guidelines, as these can differ by country and region, and consult the Aeronautical Information Manual (AIM) or equivalent resource for the specific rules that apply.