Final answer:
For day VFR flights below 1,000 feet AGL in uncontrolled airspace, pilots must have at least 1 mile of visibility.
Step-by-step explanation:
For day VFR (Visual Flight Rules) flights below 1,000 feet AGL (Above Ground Level) in uncontrolled airspace, the minimum visibility required by the Federal Aviation Regulations is usually 1 mile. However, this can vary based on the rulemaking of the country in concern and pilots should always be aware of and comply with the local aviation regulations. It is important for safety reasons to maintain sufficient visibility to see other aircraft, obstructions, and to navigate safely.