Sonar
Sonar is a technique that uses sound to navigate, communicate with or detect other vessels, and to observe the distance and velocity of underwater objects. The acoustic frequencies used vary from extremely low (infrasonic) to very high (ultrasonic). The word “sonar” also describes the equipment used to gather and analyze acoustic information. Sonar is used in depth sounding, fish finding, seafloor mapping, Doppler navigation, and acoustic location systems for divers. The term for the scientific study of underwater sound is hydroacoustics.
Three types of technology are categorized as "sonar":
- Passive sonar uses receiving sensors to listen for and analyze the sound made by vessels
- Active sonar uses an acoustic projector to emit pulses of sounds and a receiver which detects the echoes to find the range, bearing and relative motion
- Acoustic communication systems use a projector and receiver at both ends of the acoustic path
Sonar was first proposed as a means of detecting icebergs, but government interest in and funding of sonar systems did not take off until World War I highlighted the threat posed by submarine warfare. Modern technological innovations have included rapid-scanning and side-scan sonar, the echo sounder (or depth detector,) and within-pulse electronic sector scanning sonar (or WPESS). Military uses of sonar include systems used in acoustic homing torpedoes, in acoustic mines and mine detection.

Two NUWC Division Newport Employees Win 2024 American Society of Naval Engineers Awards
Two Naval Undersea Warfare Center (NUWC) Division Newport engineers have won American…

Massa Products Corporation: Innovating Sonar Technology & Securing the Future of the Maritime Workforce
Dawn Massa Stancavish, President, CEO, and Chief Innovation Officer, Massa Products Corporation…

First Dutch Navy Mine Countermeasure Vessel Starts Sea Trials
The Vlissingen, the second of the series of mine countermeasures vessels (MCM) of…

Fascinated by Shipwrecks Podcast: Episode 8 – Vince Capone
The Fascinated by Shipwrecks Podcast, hosted by Kathy A. Smith, is dedicated to…

Obituary: Karl Kenny, Founder, Kraken Robotics
Kraken Robotics Inc. announced the passing of founder and former CEO, Karl Kenny on February 11…

Great Ship of 2024: CSD Vaneta Marie
Muddy Water Dredging’s new cutter suction dredge (CSD) Vaneta Marie “represents the…

Swedish, U.S. Marines Team @ Exercise Archipelago Endeavor 2024
Swedish and U.S. Marines gathered in Sweden’s rocky coastal archipelago to improve…

Moose Boats to Build Patrol Boat for Sacramento County
The Sacramento County Sheriff’s Marine Enforcement Detail has selected Moose Boats to build a new…

Billions in Lost Treasure: How Modern Technology Is Revealing Hidden Riches from the Depths!
Oceans worldwide hold untold riches hidden beneath the waves. Now treasure hunters…

Bayesian Yacht Disaster: How Specialist Search and Rescue Teams Work Underwater
Search and rescue for missing persons is always challenging for the specialist recovery…

Greensea IQ Contract to Further Develop USN Autonomous Vehicle
Greensea IQ announced an extension to its prototype (Other Transaction Agreement)…

New Fireboat Delivered to Cape Coral Fire Department
Theodore, Ala. boatbuilder Silver Ships said it has recently delivered a newly built…
Narco-submarines, the clandestine vessels used by drug traffickers, represent one of the most sophisticated and elusive methods of smuggling drugs across international waters. These semi-submersible and fully submersible crafts are a testament to the ingenuity and resourcefulness of criminal organizations in circumventing law enforcement efforts. This article delves into the history, construction, operation, and interdiction of narco-submarines, highlighting their impact on global drug trafficking.
3D printing, also known as additive manufacturing, is rapidly gaining traction in the shipbuilding industry. This innovative technology allows for the creation of complex components and structures by adding material layer by layer, rather than subtracting it from a larger block. As the maritime sector seeks to enhance efficiency, reduce costs, and improve sustainability, 3D printing is emerging as a powerful tool that has the potential to revolutionize shipbuilding and repair processes.
Sonar is a technique that uses sound to navigate, communicate with or detect other vessels, and to observe the distance and velocity of underwater objects. The acoustic frequencies used vary from extremely low (infrasonic) to very high (ultrasonic).
Modern pipelines are installed with and other control devices (pumps and valves) to efficiently move liquids, gases, slurries (solid particulates in liquid suspension) and even solids. Pipelines usually consist of welded sections of metal pipe…
"Offshore" refers to the discovery and development of oil and gas resources which lie underwater. Usually the term refers to ocean-based oil extraction , though the term can also apply to drilling in lakes and inland seas. The remote locations…