![]() They offer the same tactile feedback as a traditional notebook-doodle, sketch, annotate, write, and edit to your heart’s content-but allow you to digitize them with ease. To get actual GPS coordinates, instead of tracking locations relative to the dive leader, the leader needs to be wirelessly connected to a surface device on a boat with GPS capabilities.There will always be a place for pens, pencils, and paper, but a digital notebook can make it a lot more convenient to get your analog ideas onto your computer for editing and sharing. When tested with four to five devices in local lakes and a pool, the app estimated locations with an average error of about 5 feet (1.6 meters) - close enough for divers to see each other in most environments. The app needs at least three devices in its network to function, and its accuracy improves as more devices are added. If a device also tracks depth, as sport monitors like the Apple Watch Ultra or the Garmin Descent do, the system can locate divers in 3D. Based on these distances, the app can estimate the group’s formation and each diver’s location. With the app, if the dive leader has at least one other diver visible, the group’s devices can send acoustic signals to each other through their microphones and speakers and use the timestamps to estimate each diver’s distance. The UW team found that such buoys aren’t necessary. The underwater GPS app runs on a smartwatch. Previous underwater positioning systems have relied on strategically placed buoys, but these systems are expensive and cumbersome to deploy, leading many divers to do without. Sound, though, travels faster and farther in water than it does in air. It’s kind of the final frontier.”Ībove water, GPS relies on a vast satellite network to locate mobile devices with radio signals. “But the one place where we still hadn’t made mobile devices work was underwater. ![]() Allen School of Computer Science & Engineering. You can be in a forest or on a plane and still get internet connectivity,” said lead author Tuochao Chen, a UW doctoral student in the Paul G. “Mobile devices today can work nearly anywhere on Earth. The team will present its findings in September at the SIGCOMM 2023 conference in New York City. This range can extend with more divers, if each is within 98 feet of another diver. When at least three divers are within about 98 feet (30 meters) of each other, their devices’ existing speakers and microphones contact each other, and the app tracks each user’s location relative to the leader. Now, a team at the University of Washington has developed the first underwater 3D-positioning app for smart devices. Yet even though many dive with smartwatches designed to go to depths of over 100 feet, accurately locating mobile devices underwater has confounded researchers. Divers frequently swim with limited visibility, which can become a safety hazard for teams trying to find each other in an emergency. University of WashingtonĮven for scuba and snorkeling enthusiasts, the plunge into open water can be dislocating. A team at the University of Washington has developed the first underwater 3D-positioning app for smart devices, such as the smartwatch pictured here.
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