Chinese students build underwater messaging tool that avoids radio signals
A group of five students from China has invented DiveGuard, a new tool that allows divers to exchange brief text messages while submerged by utilizing acoustic signals. Because it operates without radio waves, this device is ideal for difficult underwater environments where traditional hand gestures are hard to see. DiveGuard earned a spot as a finalist during the 2026 Conrad Challenge Innovation Summit.
by shortkt.com✓