How is Class C airspace indicated on a chart?

Class C airspace is indicated on a chart by using solid magenta lines. This type of airspace generally surrounds airports that have a control tower and serves to manage aircraft operations around these airports. The solid magenta line creates a clearly defined boundary for the controlled airspace, which extends from the surface up to a specified altitude.

The inclusion of solid magenta lines on the sectional charts helps pilots identify the limits of Class C airspace. Within this airspace, pilots are required to establish two-way radio communication with air traffic control before entering. Understanding the visual representation of this airspace is crucial for pilots in order to maintain proper communication and adhere to regulations when operating in proximity to these busy airports.

The other options do not accurately represent Class C airspace on charts: dashed blue lines typically indicate Class B airspace, empty circles may represent other types of airspace or specific airports, and green shaded areas are used to represent Class E airspace at certain altitudes. Understanding these distinctions is important for navigating and ensuring compliance within the National Airspace System.