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

Salvage

Ferry Runs Aground in Lynn Harbor

Ferry Cetacea ran aground about a quarter of a mile from the pier in Lynn Harbor, Massachusetts yesterday, with 13 passengers and four crew aboard, the U.S. Coast Guard (USCG) reported.

Coast Guard Responds to Capsized Tug in Chicago

The Coast Guard is responding to the capsizing of a tug on the Calumet River near the 106th St. Bridge in Chicago in which two crew members were able to escape and swim to shore.

Crippled Pine Galaxy Arrives in San Francisco

The disabled mixed-products tanker Pine Galaxy arrived in San Francisco for repairs Wednesday. Commercial tugs towed the ship safety into the Port of San Francisco

Maritime Security

EU Warship Provides Seychelles CG Training

EU Naval Force Warship 'FGS Berlin' has conducted local maritime capacity building in the Seychelles informs EUCAP Nestor. Three Local Maritime Capacity Building

Ulrich Ganz of Bernhard Schulte Joins Tundra

Tundra Group is delighted to announce the addition of the former Senior Company Security Officer (CSO) of Bernhard Schulte Shipmanagement (BSM), Captain Ulrich Ganz,

USCG Medevacs Mariner in Port Alexander, Alaska

The Coast Guard medevaced an 87-year-old female reportedly suffering from complications associated with a lower back injury aboard the fishing vessel Annie B in Port Alexander, Sunday evening.

 
 
Maritime Security Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1618 sec (6 req/sec)