Handheld underwater detector, all metal mode, vibration pulse sensing, underwater treasure hunting detector, fully waterproof Emitting and controlling ultra low frequency underwater acoustic waves using a marine vibration system with time interfacing Communications Engineering With Oceanic+ safety stops are easier than ever. Warnings are customizable, displayed brightly, easily visible, and accompanied by vibration notifications to the user during the dive. Download Oceanic+ on the App New Research Gives Crews Insight Into Underwater Noise in Real Time