Part of the reason San Clemente Island is closed a lot of the time now, the first place to look for a dive instructor

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Posted by on October 11, 2004 at 02:59:01:

The ballistic-missile submarine Georgia lurks off San Clemente Island. Its missile tubes have been emptied of their nuclear warheads.

A team of Navy SEALs has taken over several compartments and vacant tubes. Contractors and naval engineers have modified other spaces into a battle command center.

The Washington state-based Georgia and its 155-member crew are the centerpiece of a Navy experiment called Silent Hammer.

The Navy is studying ways that four former boomers the nickname for missile subs can become stealthy, undersea command posts, surveillance centers and launching pads for hundreds of Tomahawk cruise missiles.

"We're pushing the envelope" for submarines, said Cmdr. Dave Duryea, Silent Hammer project manager.

The trial began a week ago and ends Thursday.

Over the next few years, the Pentagon will convert ballistic-missile subs Georgia, Ohio, Michigan and Florida into nuclear guided-missile submarines, known by the Navy acronym SSGN.

Each submarine's 24 Trident intercontinental ballistic missiles will be replaced by up to 154 cruise missiles. The subs were scheduled for the scrap heap to comply with a strategic arms reduction treaty, but Pentagon planners realized the subs could be converted into launching pads for cruise missiles.

Several other changes are planned, including the modification of two missile silos and several compartments into special chambers and berthing for commandos and their gear. Also, an air lock and a docking hatch for the SEALs' new minisub, called the Advanced Delivery System, will be installed.

Putting Navy SEALs and their minisub aboard the large submarines and newer attack submarines should expand the number and types of missions the commandos can accomplish, said Scott Truver, a naval analyst and group vice president of Anteon Corp. in Washington.

Duryea said that's exactly the purpose of trials such as Silent Hammer.

"We're continuing to work on developing teamwork between special-operations (forces) and submarines," he said.

For Silent Hammer, a prototype battle-management center has been carved out in the Georgia, Duryea said.

"It's the first time to have an embarked commander and staff on a sub who can command and control (special-operations) forces," he said. Because of submarines' stealthy nature and cramped quarters, the undersea vessels have never been command posts.

The sub has room for up to 60 SEALs and their gear many times the number that could be carried on smaller attack submarines.

Besides Tomahawk missiles, the former ICBM launch tubes, which are 88 inches across and more than 44 feet high, could be loaded with modules containing unmanned aerial or underwater vehicles or other short-range missiles, Duryea said.

"There's a lot of things you can put in those tubes," Duryea said.

Last week, one of Georgia's missile tubes released a capsule containing a mock-up of an unmanned aerial reconnaissance vehicle that is under development. Although no drone was launched, two Navy airplanes orbiting nearby are sending live surveillance video to the submerged Georgia for analysis as part of the experiment, Duryea said.

The submarine exercise also is linked electronically with another Navy trial, Trident Warrior, which is running simultaneously off the West Coast.

Trident Warrior involves San Diego-based amphibious ships Tarawa, Pearl Harbor and Cleveland; the destroyer John Paul Jones; and the cruiser Chosin. The ships are testing new ways to use satellite and computer communications to speed up coordination and attacks by far-flung ships and aircraft.

"The technology being tested is essential to conduct battles in the future," said Rear Adm. Robert Conway, who commands Expeditionary Strike Group 1, based on the Tarawa.

Experiments such as Silent Hammer can benefit the Navy, analyst Truver said, adding, "It is important, and the results need to be addressed honestly and candidly."

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