Class Echo airspace has four distinct floor levels and covers more of the U.S. than any other airspace class - here's how to read every symbol correctly.
Class Echo is five distinct airspace configurations on your sectional - here's how to identify each one and apply the correct weather minimums for every flight.
Class Bravo airspace requires an explicit ATC clearance before entry - not just radio contact or a squawk code - a distinction that catches VFR pilots off guard more than almost any other rule.