To the seas that
make us.
Three decades of Caribbean voyages where teens learn to sail a 50-foot catamaran, earn PADI certifications, and study coral reef ecology from the surface they're swimming above.
Thirty-One Years of Voyages
Since 1995, Odyssey Expeditions has taken thousands of teenagers across more than fifteen Caribbean nations — not on tours, but on voyages. Real ones, with watch schedules, navigation plotting, and dive briefings before breakfast.
Our students sail catamarans through the Windwards and the Grenadines. They earn PADI certifications by descending onto living coral reefs. They learn marine biology from working biologists, and contribute to long-running conservation projects in communities that know us by name. They return changed — not by a vacation, but by a summer that asked something real of them.
Featured Voyages
Choose by destination, by certification track, or by length. Every voyage carries the same crew-aboard, hands-in-the-water approach we've spent thirty-one years refining.
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New for 2027 Windward Discovery
No experience necessary. Earn PADI Open Water and Advanced Open Water while sailing the Windwards.
Ages 12–20 $5,750 -
Windward Adventure
Professional PADI Divemaster track for certified Rescue Divers. Wreck and night diving included.
Ages 15–17 · Jr Divemaster $5,750 -
Flagship Grenadines Adventure
Three nations, five PADI certifications, two thousand miles of reef. Our most ambitious itinerary.
Ages 13–22 $7,350 -
Florida Kayaking & VR Naturalist
Expert-led kayaking adventures with virtual reality marine education for adults and teens.
All Ages From $185
Hands in the Water
Marine Biology, Not a Slideshow
Our voyages are taught by working marine biologists — not summer counselors with a guidebook. Students conduct reef surveys, identify cephalopod behavior, and contribute observations to peer-reviewed research. In 2019, an Odyssey voyage in St Vincent recorded the first documented cannibalistic attack in a wild Octopus vulgaris — published in the Journal of Molluscan Studies.
Free from our founder
Explore the ocean from home
Odyssey founder Jason Buchheim, a marine biologist and licensed captain, builds free tools for curious divers, sailors and students: a coral reef game drawn from his own research, and the navigation, sky and weather tools a voyage runs on. Try them before you sail.
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 ↗
Celestial NavigationSextant
Find your position from the sun or moon with your phone’s camera and motion sensors, the way navigators did before GPS.
Open free ↗
Compass & HorizonHeading
Point your phone and see what lies over the horizon along the way you face, on a live map.
Open free ↗
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.
Open free ↗
Ships on a 3D EarthShip Globe
Ships and ocean routes on a spinning 3D globe.
Open free ↗
Learn & Decode MorseMorse Trainer
Learn, key, hear and decode Morse code, the signal sailors have relied on for more than a century.
Open free ↗
Weather from SpaceCloud Globe
Today’s cloud cover on a spinning 3D Earth, with the weather wherever you look.
Open free ↗
Sun & Moon LightIlluminate
Where the sun is shining on Earth right now, with sunrise, sunset and moonlight for any place.
Open free ↗
The Solar SystemSolaris
Our Solar System on any date, and how one forms from dust: the sky celestial navigators steer by.
Open free ↗
You Run the Boat
Crew, Not Passengers
On day one you learn the lines. By day three you're standing watch. By the time you sail into a different country, you're plotting the course. Our 50-foot catamarans are working sailing vessels, and our students run them — under the eye of licensed captains, but with real responsibility for navigation, anchor watches, and provisioning.
Communities, Not Resorts
Nine Caribbean Nations Know Us
Three decades of returning to the same harbors means the dive shops know our names, the bakers stay open late when our boats arrive, and the local conservation groups assign our students to ongoing projects. The Caribbean we show is the one we know — not the one printed in glossy brochures.
Eight ways to spend a summer at sea.
From Our Crews
Read 50+ Reviews on FacebookThe crew became a family. By the end of three weeks I knew how to read a chart, identify a hundred reef species, and fall asleep under more stars than I'd ever seen.