New JW Fishers HF Side Scan Sonar

Press Release
Monday, December 31, 2012
Image credit JW Fishers

JW Fishers spotlights its new 1200 kHz sonar which provides detailed images of even small and soft underwater targets.

This new side scan sonar can show extremely detailed images of even small and soft targets such as old wood wrecks, areas of scattered debris, or even a drowning victim.

When the 1200 kHz was towed over a bicycle that had been disposed of in a waterway, not only were the bike’s frame and wheels clearly visible, but also the seat and other features.

The new sonar is available as a single frequency system or a dual frequency side scan with two sets of transducers in one towfish. Putting two sets in one fish provides tremendous versatility allowing the operator to switch between frequencies at any time during operation. The lower frequency is capable of scanning long ranges, but with less resolution. High frequency has a shorter scan range, but produces highly detailed images.

In a typical search operation an initial scan is done with the low frequency. When a potential target is located, the operator switches to the high frequency and makes a closer pass yielding an exact identification of the object.  The two frequencies available for coupling with the 1200 kHz in a dual frequency system are the 600 kHz and the 100 kHz. The 600 kHz provides an excellent combination of range and resolution with a maximum scan of 200 feet per side (400 foot swath), yet with the capability of detecting small targets. The 100 kHz has the longest range, up to 2,000 feet per side (4,000 foot swath),  making it ideal for scanning large areas when searching for big targets  such as downed aircraft or sunken ships.

Fire and police departments consider side scan an essential piece of equipment for their dive teams. Sonar can save hours of dive time and dramatically increases the safety factor. Towing the sonar over an area produces a detailed map of the underwater terrain so divers know exactly what’'s down there before entering the water. Even in zero visibility environments the clarity of the image is the same.

Another option for Fishers' side scan systems are Sonar Map Coverage software which shows the track of the boat as it moves over the search area and the size of the area being scanning, ensuring no part of the area is missed. The map can be displayed in a small window laid directly over the side scan track, or displayed alone, and GPS position coordinates are automatically captured with the sonar data. During playback the sonar track can be overlaid onto a nautical chart showing the precise location of the search operation.

In the picture: Side scan sonar fish, with inset image of a bicycle on river bottom.

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter April 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Vesper Marine Updates WatchMate Vision

Vesper Marine, a manufacturer of marine safety products, announced a free upgrade for its flagship AIS Class B transponder, the WatchMate Vision, streamlining usability,

Wind-powered Oil Recovery Project Green-lighted

The DNV GL-led WIN WIN Joint Industry Project (JIP), which melds offshore wind with offshore oil and gas, shows that for suitable fields,finds that  wind-powered

Barge Master Wins Innovation Award at OTC

The Barge Master T40 motion compensated knuckle boom crane has been recognized for technological innovation, winning the Spotlight on New Technology Small Business

Marine Equipment

CRMG Cranes Arrive in Mersey for Liverpool2

First six of 22 to be installed at £300m terminal; arrival marks end of 13,730 mile (11,930nm) journey from Nantong, China   The first six cantilever rail-mounted

Vesper Marine Updates WatchMate Vision

Vesper Marine, a manufacturer of marine safety products, announced a free upgrade for its flagship AIS Class B transponder, the WatchMate Vision, streamlining usability,

Crane Upgrade for Jack-up Vessel Sea Installer

Major modification work will bring A2SEA-owned vessel into line with growing demands of offshore wind industry   Damen Shiprepair Amsterdam (DSAm), part of Damen Shiprepair & Conversion,

Unmanned Vehicles

Cyberhawk Sinks Claws into US O&G Market

Cyberhawk Innovations, the world leader in aerial inspection and survey using Unmanned Aerial Vehicles (UAV), is set to boost its international credentials with

Unmanned Aircraft Features Maritime Radar

An updated version of the shipborne UAS AR3 NET RAY is touted as the first in class providing maritime radar capability   The UAS producer TEKEVER is launching at Xponential-AUVSI,

Another Mission Needed to Recover El Faro’s VDR

The investigative team who located the El Faro’s voyage data recorder (VDR) has determined that another mission will be necessary in order to retrieve the device,

 
 
Maritime Standards Naval Architecture Offshore Oil Pipelines Port Authority Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0661 sec (15 req/sec)