Dive Navigation Computer Navygator - Pro

https://www.oceanplantech.com/products/dive-navigation-computer-navygator-pro.html

Navygator-Pro is an arm-worn dive navigation computer, which features diver to diver also diver to surface boat's underwater positioning, underwater navigation, SOS alarm, abnormal state warning, and underwater message sending and receiving. With absence of surface signal support, the diver navigation system support with underwater independent network that remain divers covert,which means the divers keep knowing where they are and where their buddies are without the need to surface or carrying with a floating GPS unit. Through flexible product combination solutions, different diving activities of multiple divers can be managed and planned.