At each end one of Microsoft's Kinect depth camera sensors is used to track the direction of each person's gaze as well as to capture the shape and appearance of objects placed on the surface and the participant sitting behind them.
Each time the leatherbacks surface to breathe, the transmitters attached to their shells send data about their location, water temperature and water depth via satellite, allowing marine biologists to track their progress with GPS precision.
Now there are some startups that do offer some great depth in specific areas mainly because they are later stage startups that are already on the track to having a proven business model.