Sonar equipment and parts thereof; Underwater acoustic detection apparatus; Apparatus for wireless transmission of acoustic information; Hydrophones; Sonar systems comprised of transducers, electronic circuit boards, mechanical housings, and embedded computer firmware and software, all for enabling manned and unmanned underwater vehicles to navigate and be situationally aware of underwater surroundings and to communicate and rendezvous with launch and recovery platforms; Acoustic communication and telemetry systems comprised of transducers, electronic circuit boards, mechanical housings, and embedded computer firmware and software, all for enabling communication between manned and unmanned underwater vehicles and other underwater and surface vehicles; Marine and underwater surveillance, navigation, and positioning equipment, namely, transducers, transceivers, graphical user interface (GUI) displays, transponders, electronic circuit boards, mechanical housings, and embedded computer firmware and software for operating the aforesaid equipment; Flexible hydrophone and projector array systems comprised of transducers, electronic circuit boards, mechanical housings, and embedded computer firmware and software, all for dynamic towed applications or static fixed applications; Range systems comprised of transponders, transceivers, acoustic communication links, transducers, electronic circuit boards, mechanical housings, and embedded computer firmware and software for operating the aforesaid components
Electrical and Scientific Apparatus