Hydro-Acoustic System Safe and Sound Waterfront Reliable Diver Interdiction System. Non-Lethal Acoustic Underwater Deterrence. ► Efficient warning to prevent intrusion; ► Effective deterrence in case of disobedience; ► 160 dB of acoustic force. TALISMAN-P is designed to protect critical maritime assets and enhance Homeland security. Hydroacoustic-based security device is an efficient tool to provide underwater diver barrier. TALISMAN-P operates as an underwater loudhailer to send initial warnings....