FIBER OPTIC POWER & UNDERWATER CONSTRUCTION
This project included dredging/excavation to prepare for sensor array installation, MEC/UXO screening (dredging approximately 1,200 CY) and the installation of an Underwater Electro-Magnetic Measurement System (UEMMS). This was an effort in support of Pacific Fleet requirements to magnetically range all classes of USN surface ships and submarines.
Installation of a new UEMMS array consisting of 22 – 12” diameter 20-foot long FRP sensor tubes; concrete anchor discs and PVC pipe anchors from Array to Shore Transition; linear array of twenty-two sensors: 13 combination electro-magnetic triaxial (EMT) sensors, 8 triaxial magnetometers (MT) and 1 conductivity, temperature, and depth (CTD) sensor. The EMT and MT sensors were installed in a straight line to specification and spaced on 20-ft centers. In addition, we installed four spare cables (2 EMT and 2 MT) within the array area. The array was centered on and aligned perpendicular to the navigation channel. The sensor cables were routed from the array along the seafloor to the shore landing location, where we installed a new, below-grade transition vault to transition the sensor cables to a dry, secure box located onshore at Polaris Point. Once onshore, the cables were connected to the data acquisition equipment located in the Force Protection Tower at Polaris Point.
Cable lay length total: 100,320′
Dive depths: 70’+
