What is the minimum weather visibility for takeoff in Class B airspace?

In Class B airspace, the minimum weather visibility requirement for takeoff is indeed three miles. This standard is in place to ensure that pilots have sufficient visual reference to safely operate an aircraft during departure, especially given the higher density of air traffic and the potential for encountering other aircraft. The three-mile visibility requirement supports a margin of safety for pilots to see and avoid obstacles and other aircraft during critical phases of flight.

While some other airspaces may have different visibility requirements, Class B airspace specifically mandates this three-mile visibility to enhance operational safety and efficiency, particularly in busy terminal areas. It's important to note that although other airspaces may have more lenient visibility minimums, Class B is designed to accommodate the increased complexity and traffic that comes with urban and metropolitan areas.