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Yamagata Casio have come up with this brilliant way for divers to communicate. The Casio Logosease is the world's first two-way underwater radio walkie-talkie device. With a range from 50 to 100 meters (164-328 feet) and the ability to work at depths of 40 meters (131 feet) under the waves, you just have to face each other to speak to your fellow diver.
But radio waves do not travel underwater. How can you talk to another diver? By ultrasonic waves. Well, the unit modulates voices into ultrasonic waves. Simply attach the device to your diving mask and you will be able to converse via an air regulator in your mouth.
Tap once to start transmitting and then tap again when you are finished. Your partner(s) will then receive your audio as modulated ultrasound which is demodulated via a bone conduction speaker. While the voice and audio quality is not as perfect as on land, it is still clear enough to enable safe communication.
Already approved for use in its courses by Professional Association of Diving Instructors (PADI), the world's leading scuba diving training organization, the Logosease name derives from "language" (logos), "sea" and "ease". No more reliance only on hand signals. In this set you get two units in matt white.
The Casio Logosease Underwater Two-Way Radio features: