Do you know why "direct to" won't always work? Or how to avoid following the moving map straight into an airspace incursion? For answers to these and more questions, take the AOPA Air Safety Foundation's GPS for VFR Operations online course. Learn about the GPS system, how it works, and how you can use it to make your next VFR flight more efficient, enjoyable, and safe. If you're an instrument-rated pilot thinking of using GPS "in the system," check out the foundation's GPS for IFR Operations online course. It provides the background pilots need to get the most from in-depth, receiver-specific training, including common terms and receiver functions. Both are great resources to use when planning air travel this summer.