Unlike sectional charts, VFR terminal area charts are available only for select areas. They use a scale of one to 250,000 and should be used for navigation when they are available. Terminal charts give pilots more information about the busy areas in and around Class B airspace. They have the same types of information as sectional charts but offer even more details, especially about airspace, airports, obstructions, terrain, and visual checkpoints.
World aeronautical charts or WACs use a one to 1 million scale and are best used over long distances by pilots of fast airplanes. Each chart covers a large area, and the scale means that much of the detail of terminal and sectional charts is lost. Nevertheless, WACs do include cities and towns, main roads, railroads, distinctive landmarks, frequencies, airways, and restricted areas.
Finally, airport taxi charts are sometimes used by VFR pilots. Like terminal charts, they are available for many of the largest airports. Taxi charts help pilots find their way, expediting the safe flow of traffic. They are identified by the official airport name, such as Dulles International Airport.
Because flying safely has a lot to do with having good information, it's important to fly with current charts appropriate to the type of flying you do.