GNS 500W seamlessly integrates built-in terrain and navigation databases, providing a clear, concise picture of where you are and where you’re heading. The 500W's huge Jeppesen® database, updated with front-loading data cards, contains location reference for all airports, VORs, NDBs, Intersections, Flight Service Stations, published approaches, SIDs/STARs, Special Use Airspace and geopolitical boundaries. A detailed basemap clearly shows airports, cities, highways, railroads, rivers, lakes, coastlines and more. Using information from the built-in terrain and U.S. obstacles databases, the 500W displays color coding to graphically alert you when proximity conflicts loom ahead. In addition, you can augment GNS 500W with optional Class-B Terrain Awareness and Warning System (TAWS) for an extra margin of safety in the air.