UNAS – Underwater Navigation System for Scuba Divers

Leisure time scuba divers are commonly attended by professional guides familiar with the diving site. This ensures their save return to the boat or the entry point. Ambitious and experienced scuba divers orientate themselves on underwater topography and utilize a compass. However, only very experienced divers manage to exactly navigate while maintaining exact compass-to-body orientation as well as exact neutral buoyancy. Additionally, topography aided navigation is often limited by poor visibility.

It thus would be desirable for scuba divers to have an easy-to-operate and reliable navigation system similar to those already known from road traffic navigation. Road traffic navigation systems rely on the reception of radio frequencies broadcasted by GPS satellites. However, the underwater GPS signal range is too short. Known solutions utilize GPS receiving buoys. Their signals are transmitted to the diver’s navigation system by means of a cable reel. In practice this method is too complex for leisure time scuba divers.

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