June 2008 Issue

Feature Articles

EXPLORING WEST FLORIDA ESCARPMENT WITH HIGH-RESOLUTION GEOPHYSICAL IMAGING
William W. Sager (Texas A&M University), Jih-Ping Shyu (C & C Technologies) and Justin Manley (Battelle) discuss the NOAA-funded industry-academic survey to map part of the WFE by AUV.

EXTENDING THE MULTIBEAM ANGULAR SECTOR TO IMPROVE SEAFLOOR CLASSIFICATION
Lt. Cmdr. Aluizio M. Oliveira Jr. (Brazilian navy) and John E. Hughes Clarke (University of New Brunswick, Fredericton) outline a three-step process to explore the outermost beams of multibeam backscatter.

SHALLOW-WATER SURVEY EFFICIENCY USING SWATH BATHYMETRY
Frederick Hegg (Hegg Marine Solutions) and Rick Tidd (Teledyne Benthos) achieve effective survey performance in a dynamic and challenging near-shore environment.

OCEANOLOGY INTERNATIONAL ‘08: RECORD ATTENDANCE REFLECTS GLOBAL AWARENESS
—Conference Review

VERTICAL POSITION ERROR ESTIMATION IN TPE AND CUBE FOR HYDROGRAPHIC SURVEYING
Peter Canter (Applanix), Doug Lockhart (Fugros Pelagos) and Corey Collins (CARIS) discover that using altitude on the ellipsoid in place of heave delivers improved seafloor image results.

ACTIVE CROWN COMPENSATOR FOR NONCONTACT OPERATIONS
Jan Hatleskog and Matthew W. Dunnigan (Heriot-Watt University, Edinburgh) review an active system designed to reduce heave disturbance for a safer landing operation.

UNDERWATER WELDING IN HYPERBARIC CONDITIONS
Huseyin Ozden (Ege University) studies the parameters for underwater gas tungsten arc welded joints.

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NEXT MONTH:
Reduction in braided rope strength due to twist...Real-time monitoring of the suspended sediment plume created while trenching and laying cable...Better batteries through magnetism, applied to nautical systems...The NEPTUNE project: a cabled observatory in the Northeast Pacific Ocean...WHOI long core system installed on the RV Knorr.