A tool for all aviation enthusiasts, NavSim is a free, open-source, user-configurable Flight Simulator add-on that assists the virtual pilot in all aspects of flying, from pre-flight preparation and planning, to executing and monitoring the flight, to post-flight analysis.

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Intended as an “all-in-one” virtual aviation accessory, NavSim is a standalone Windows/PC application that runs on your local machine, but not necessarily on the same PC that hosts the Flight Simulator. As such, NavSim could be a valuable tool for flight-schools and instructors.

NavSim’s primary display is a visual, interactive moving map of the world, in which all relevant cartographic and navigational data is plotted. Similar to a GPS display, NavSim offers rich visualization with an assortment of features, including airport and navigational aid display, "measuring tape", and more.

From within NavSim, you can connect to a running instance of Microsoft Flight Simulator X via SimConnect to obtain real-time information about the flight in progress, and the weather. You can also monitor FSD-based online ATC networks, such as VATSIM or IVAO, and show their online members including pilots, ATC controllers, and observers.

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