What is the speed limit under Class B airspace?

In Class B airspace, the maximum speed limit is indeed 250 knots, with specific regulations applying to certain circumstances. However, within the vertical boundaries of Class B airspace, aircraft are also required to reduce their speed to 200 knots when flying beneath the ceilings of Class B airspace or in areas where air traffic control specifically directs a lower limit due to congested air space or severe traffic conditions.

Therefore, while 200 knots is a more conservative limit, the definitive limit under Class B airspace when considering all regulations particularly within proximity to runways and congested areas can be viewed as 250 knots unless specified otherwise. This makes the understanding of operational requirements in Class B airspace essential for safe navigation and adherence to aviation regulations.