Free ocean tools
Explore the ocean from home
Free tools by Odyssey Expeditions founder Jason Buchheim, a marine biologist and licensed captain: a coral reef simulation game, and the navigation, sky and weather tools a voyage runs on. They all run in your web browser, on a phone or a computer, with nothing to install.
Spinyhead: life as a reef fish
Be a tiny Caribbean reef fish on a living coral head: catch drifting plankton, dodge predators, fight your neighbors for the best hole and raise your eggs. Built on our founder’s own field research. Free in your browser, solo or with friends.
Play free in your browser ↗Navigation & Seamanship
How sailors find their way: by sun and moon, by compass, by signal, and by the ships around them.
Celestial NavigationSextant
Find your position from the sun or moon with your phone’s camera and motion sensors, the way navigators did before GPS.
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Compass & HorizonHeading
Point your phone and see what lies over the horizon along the way you face, on a live map.
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Speed, Distance & TimeSuper Fun Calculator
Enter any two of speed, distance and time to get the third, in knots and nautical miles for planning a passage, or anything from Planck lengths to galactic years.
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Ships on a 3D EarthShip Globe
Ships and ocean routes on a spinning 3D globe.
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Learn & Decode MorseMorse Trainer
Learn, key, hear and decode Morse code, the signal sailors have relied on for more than a century.
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Sea, Sky & Weather
The weather, light and sky that shape every day at sea.
Weather from SpaceCloud Globe
Today’s cloud cover on a spinning 3D Earth, with the weather wherever you look.
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Sun & Moon LightIlluminate
Where the sun is shining on Earth right now, with sunrise, sunset and moonlight for any place.
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The Solar SystemSolaris
Our Solar System on any date, and how one forms from dust: the sky celestial navigators steer by.
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Want to learn this at sea? On an Odyssey voyage, students study the reef underwater, stand watch and help navigate a 50-foot catamaran.