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concern over environmental issues in ports."

The Harbor and Acoustic Fences were deployed and tested around the aircraft carrier museum USS Midway in

San Diego for six months. It recently passed its proof of concept for the Navy and Coast Guard.

McDonald pointed out that the Acoustic Fence can be adapted for other anti-swimmer applications. "For a more fixed installation, it can be placed on the sea bottom and set to look upward to detect divers, or other intrusions," he said. "It can also be placed on the pilings of a pier looking outward. This ensures a diver can't approach or hide explosives under the pier."

The need to exclude or intercept hostile personnel and dangerous material in our seaports is the first line of domestic defense. By incorporating multiple layers of sen- sors and surveillance, SAIC's Integrated Harbor Security

Systems provide a cutting-edge technology solution to respond rapidly and effectively to threats to help keep the trade and supply chain open with a minimum of risk and personal safety. www.seadiscovery.com Marine Technology Reporter 37

Richard Theisen (left) and Rick Barnes study the com- puter interface for security breaches in the fence and the underwater sentry system. The harbor fence was deployed around the USS Midway, a carrier museum in

San Diego.

Above: The harbor fence deployed around the Sapphire

Princess.

Left: Deployment of the harbor fence from pierside.

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Marine Technology Reporter is the world's largest audited subsea industry publication serving the offshore energy, subsea defense and scientific communities.