Media Credit: AP K-Dog, a dolphin, leaps out of the water in front of Sgt. Andrew Garrett while training near the USS Gunston Hall in the Arabian Gulf.

SAN DIEGO - Dozens of dolphins and sea lions trained to detect and apprehend waterborne attackers could be sent to patrol a military base in Washington state, the Navy said Monday.

In a notice published in this week's Federal Register, the Navy said it needs to bolster security at Naval Base Kitsap-Bangor, on the Puget Sound close to Seattle.

The base is home to submarines, ships and laboratories and is potentially vulnerable to attack by terrorist swimmers and scuba divers, the notice states.

Several options are under consideration, but the preferred plan would be to send as many as 30 California sea lions and Atlantic Bottlenose dolphins from the Navy's Marine Mammal Program, based in San Diego.

"These animals have the capabilities for what needs to be done for this particular mission," said Tom LaPuzza, a spokesman for the Marine Mammal Program.

LaPuzza said that because of their astonishing sonar abilities, dolphins are excellent at patrolling for swimmers and divers. When a Navy dolphin detects a person in the water, it drops a beacon. This tells a human interception team where to find the suspicious swimmer.

Dolphins also are trained to detect underwater mines; they were sent to do this in the Iraqi harbor of Umm Qasr in 2003. The animals were used operationally in San Diego was in 1996, when they patrolled the bay during the Republican National Convention.

Sea lions can carry in their mouths special cuffs attached to long ropes. If the animal finds a swimmer, it can clamp the cuff around the person's leg. The individual can then be reeled in.

The Navy is seeking public comment for an environmental impact statement on the proposal.

The Navy wanted to deploy marine animals to the Northwest in 1989, LaPuzza said, but a federal judge sided with animal-rights activists concerned about the effects of cooler water, as well as how the creatures would affect the environment. Water in the Puget Sound is about 10 degrees cooler than in San Diego Harbor, which has an average temperature of about 58 degrees, LaPuzza said.

Since then, the Navy has taken the dolphins and sea lions to cold-water places like Alaska and Scandinavia to see how they cope.

"They did very well," LaPuzza said. If the animals are sent to Washington, the dolphins would be housed in heated enclosures and would patrol the bay only for periods of about two hours.

Stephanie Boyles, a marine biologist and spokeswoman for People for the Ethical Treatment of Animals, said that sea mammals do not provide a reliable defense system, and that they should not be kept in small enclosures.

"We believe the United States' citizens deserve the very best defense possible, and this just isn't it," Boyles said, adding that dolphins are easily distracted once in open water. "They don't understand the consequences of what will happen if they don't carry out the mission."

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