Earlier this week, a hydrogen-powered delivery drone managed to make a one-hour, 43-minute ocean crossing. New Atlas reports: The exercise was the result of a collaboration between Texas-based drone development company Guinn Partners, Georgia-based Skyfire Consulting, the U.S. Department of Health, and drone manufacturer Doosan Mobility Innovation — the latter supplied the aircraft, a hydrogen fuel cell-powered DS30 octocopter. Utilizing its temperature-controlled payload system, the drone was used to transport live bacteria samples from a hospital on the Caribbean island of St. Croix to a testing facility on the neighboring island of St. Thomas. This involved crossing 43 miles (69 km) of open ocean. Upon successfully reaching its destination, the copter reportedly still had almost 30 minutes of flight time left on its fuel cell.