Due to the limitations of GPS underwater, scuba divers often struggle to track their real-time positions on digital maps. However, a solution has emerged in the form of the Diver Navigation System (DNS), developed by the German underwater technology company Evo Logics. Comprising a tracker unit, a diver console, and an ultra-short baseline (USBL) buoy, DNS employs both floating and wearable acoustic transponders to overcome this challenge.

The USBL buoy, floating on the water's surface above the diving area, continuously emits acoustic signals or "pings" through the water. These signals are received by the tracker unit attached to the diver's air tank, which automatically responds with its own ping. By analysing the time elapsed between the initial ping and the reply, along with the direction of the reply, the diver's position relative to the buoy can be determined. [1]

Figure 1. EvoLogics presents the new Diver Navigation System.

Figure 1 EvoLogics presents the new Diver Navigation System. shows Since the buoy has access to GPS via a GNSS module, its location on a map can be established by an integrated microcomputer. This information is relayed to the diver's console, a smartphone-sized device worn on the wrist, allowing the diver to monitor their location on the map in real-time. Additionally, the console enables divers to check the positions of other group members, as the buoy can communicate with up to five trackers simultaneously. The buoy also features onboard Wi-Fi for transmitting data to a support crew on the surface, who can track all divers' locations using a laptop or tablet.[2]

Furthermore, the console facilitates simple preprogrammed text messaging between divers via acoustic pulses, with the support crew also able to send and receive messages through the buoy's Wi-Fi connection.

In terms of performance, the system boasts an underwater communication range of 1.5 km (0.9 miles), a positional accuracy of approximately ±10 cm (3.9 in), and a claimed battery life of up to eight hours. Both the tracker and console are rated for a maximum depth of 50 m (164 ft).

Reference:

1. https://newatlas.com/outdoors/evologics-diver-navigation-system/
2. https://evologics.com/diver-navigation#key-features

Cite this article:

Gokila G (2024), Acoustic Navigational Tech Gets Scuba Divers Using GPS Maps, Anatechmaz, pp.246