Eddie Bryant / Free tools
Explore. Calculate. Track.
A collection of tools for diving, amateur radio, and curiosity about the world above us.
Diving
Educational references and calculations to support your dive training.
Radio & satellites
Find operating references and see when spacecraft are within your radio horizon.
Local ham radio dashboard
Enter a ZIP code for your grid square, local weather alerts, NOAA space weather, and radio references.
Ham radio satellite tracker
Explore active and inactive satellite listings, published frequencies, and upcoming passes by ZIP code.
International Space Station tracker
Follow the ISS on a globe and check visible passes, radio windows, and ARISS frequencies.
Beyond Earth
Explore another kind of journey with orbital predictions and visualizations.