Pre-Dredge Survey Under Drydock Arco at the U.S. Navy Submarine Base
San Diego, CA
NCI conducted a pre-dredge hydrographic survey under the Floating Drydock Arco, while the drydock was in place in light ballast. The survey was conducted using a Reson 9001 Multi-beam Hydrographic Surveying System mounted on NCI’s survey vessel Western Warrior. The purpose of the survey was to determine the amount of siltation accretion, which had occurred since the area was originally dredged for the placement of Drydock Arco. Used a Reson 9001 Multi-Beam Hydrographic Surveying System mounted on NCI’s survey vessel L’il Warrior to perform a hydrographic survey under the Navy’s Floating Drydock Arco. In addition to the Reson 9001, we also utilized our IT 448 single beam depth sounder. Horizontal Position of the survey vessel, and steering information for the boat operator were provided by NCI’s differential GPS navigation system. The data was processed and presented in maps generated in AutoCAD. Dredgeable material calculations were performed. Electronic files of each map were also provided to the client.