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 March 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Salvage

Lawyer: Korea Ferry Owners Accept Responsibilities

The family that has a major stake in companies that control the shipping operator whose ferry sank last week, likely to have killed hundreds, will take social and

Korean Ferry: Pair Drowned with PFD's Tied Together

A boy and girl trapped in a sinking South Korean ferry with hundreds of other high school students tied their life jacket cords together, a diver who recovered their bodies said,

Body Of Korean Boy Who Raised Alarm On Sinking Ferry Found

The body of a South Korean boy whose shaking voice first raised the alarm that a passenger ferry with hundreds on board was in trouble has been found, his parents believe,

Maritime Security

IMB: Piracy Falls to Lowest Level since 2007

The International Chamber of Commerce’s International Maritime Bureau (IMB) has revealed that piracy on the world’s seas is at its lowest first-quarter level since 2007,

Court: Japan's Mitsui Paid to Release Ship

China Supreme Court says Mitsui pays about $29 mln; Ship released about 0030 GMT Thursday. Ship was seized over dispute dating back to 1930s. Advisor to plaintiffs says will likely demand more money.

Global Shipping Exposed to Cyber Threats

The next hacker playground: the open seas - and the oil tankers and container vessels that ship 90 percent of the goods moved around the planet. In this internet age,

 
 
Maritime Careers / Shipboard Positions Maritime Standards Naval Architecture Offshore Oil Pipelines Salvage Ship Repair 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: 0.2142 sec (5 req/sec)