A routine sonar survey by the French Navy has revealed a remarkably well preserved 16th-century merchant ship lying more than 2,500 meters below the surface of the Mediterranean. The vessel, found ...

Southern Maine Community College’s new research vessel has technological capabilities such as sonar mapping and acoustic fish detection, designed to prepare students for marine-related careers.

No audio available for this content. For centuries before sonar, lidar and unmanned surface vehicles (USVs), sailors would measure depths by throwing a line overboard with a lead weight at the end — ...