NOAA Charting - Upper Cook Inlet Cook Inlet, Alaska

This project included seven multibeam surveying Task Orders in Cook Inlet, Alaska, and the Office of Coast Survey's Automated Wreck and Obstruction Information System (AWOIS) sidescan investigation of four survey sites.

Our surveyors calibrated equipment; conducted accuracy testing, accounted for sensor alignment and biases, and determined, processed and applied necessary data corrections prior to collecting data for this survey.

We collected multibeam and sidescan sonar data using several automated data acquisition systems. Multibeam data from a Reson 8101 and 8124, Seatex 200, and Trimble Ag120 GPS were collected using Reson 6042 collection software.

Four of our vessels and two leased vessels were used in the performance of these surveys. AML SVPlus data were collected and stored along with a proprietary software program that we wrote. Sidescan sonar data, when required, were collected using the Triton/Elics software package ISIS.

Task Orders for Cook Inlet required:

• Mobilizing, demobilizing, and moving between survey areas;


• Performing all surveying;


• Establishing geodetic control;


• Positioning floating aids to navigation;


• Installing and maintaining required tide gauges;


• Processing data;


• Preparing report, plots, and other deliverables; and


• Determining the least depth on wrecks and obstructions from the data acquired during the task order.

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