Sonar Imagery Assists Bow Mariner Investigation

Tuesday, March 09, 2004
(Photo credit: NOAA)

The Coast Guard has released two multi-beam sonar images taken by the NOAA ship Rude of the sunken tanker Bow Mariner. The images, taken March 4, are among a suite of side-scan sonar and multi-beam images provided by RUDE to the Coast Guard for use in its investigation of the cause of the explosion that sank the vessel on February 28.

Rude (pronounced Rudy) found the wreck on March 2, and initial side-scan imagery showed the placement and orientation of Bow Mariner. However, Rude had to discontinue operations because of bad weather. The ship returned to the scene during better weather and collected additional sonar imagery on Thursday, March 4, for the Coast Guard to review. Multi-beam sonar systems provide fan-shaped coverage of the seafloor similar to side-scan sonars, but the output data is in the form of depths rather than images. Instead of continuously recording the strength of the return echo, the multi-beam system measures and records the time for the acoustic signal to travel from the transmitter to the seafloor (or object) and back to the receiver. RUDE’s multi-beam system is attached to its hull, rather than being towed like a side scan. Therefore, the coverage area of the seafloor is dependent on the depth of the water, typically two to four times the water depth. The NOAA fleet of research and survey ships and aircraft is operated, managed and maintained by NOAA Marine and Aviation Operations. NMAO includes commissioned officers of the NOAA Corps and civilians. The NOAA Corps is the nation’s seventh and smallest uniformed service, and, as part of NOAA, is under the U.S. Department of Commerce. The Corps is composed of officers—all scientists or engineers—who provide NOAA with an important blend of operational, management and technical skills that support the agency’s environmental programs at sea, in the air, and ashore.

Maritime Reporter June 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Salvage

Container Ship and LPG Tanker Collide near Surabaya

LPG tanker Navigator Aries (23,333 dwt, built 2008), and containership Leo Perdana (33,423 dwt, built 2007) collided yesterday in waters off Gresik, nearby the Port of Tunjung Perak in Surabaya,

Brand New Ro-Ro Ran Aground in Norway

Ro-ro cargo vessel Kvitbjørn ran aground off Ulsteinvik port, Norway, in the afternoon June 28, while approaching the port.    The vessel, owned by Norway-based Nor Lines,

Barge Captain Gets Prison Time for Fatal Explosion

An Illinois man who was captain of a petroleum barge that exploded in a Chicago canal in 2005, killing a crew member, was sentenced to six months in prison on Friday, prosecutors said.

Maritime Security

Austal Starts Next US Littoral Combat Ship

Austal and the U.S. Navy held a keel-laying ceremony today for the future USS Manchester (LCS 14), marking the first significant milestone in its construction.

China Oil Rig Returns Off Vietnamese Coast

China has again deployed the Haiyang Shiyou 981, a semi-submersible oil platform which caused a standoff between Chinese and Vietnamese vessels last year, to the disputed South China Sea region,

Chinese Submarine Docked in Karachi ?

The intervention of China in the Arabian Sea is increasing with each passing day. China's deadliest attack submarine crept past Indian waters and docked in Karachi.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Naval Architecture Navigation Pipelines Port Authority Salvage 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: 0.1096 sec (9 req/sec)