Terminal Area Charts usually depict the airspace designated as Class B airspace; the Puerto Rico-Virgin Islands Terminal Chart is based on Class C airspace and the Anchorage/Fairbanks Terminal Chart is based on Class C airspace (Anchorage) and a Terminal Radar Service Area (TRSA)(Fairbanks). The information found on these charts, while similar to that found on Sectional Charts, is shown in much more detail because of the larger scale. These charts should be used by pilots intending to operate from airfields within or near Class B airspace, Class C airspace or a Terminal Radar Service Area. As of 2/25/21, VFR Terminal Area Charts all revise every 56 days.