One ship the Coast Guard uses for rescue missions in severe weather is the remarkable 47-foot Motor Lifeboat, which is about as close to "unsinkable" as any vessel currently at sea. Able to travel at speeds of up to 25 knots through 30-foot surf, the boat carries a small, but extremely hardy crew of four.

The U.S. Coast Guard’s 47-foot Motor Lifeboat is unsinkable, thanks to its design and skilled surfmen trained in advanced water rescue over six years. Introducing the remarkable 47-foot Motor Lifeboat (47 MLB), an unsinkable marvel exclusively operated by the United States Coast Guard.

Introducing the remarkable 47-foot Motor Lifeboat (47 MLB), an unsinkable marvel exclusively operated by the United States Coast Guard. This vessel’s self-righting ability is a testament to naval engineering, with a low center of gravity, high buoyancy, and watertight integrity that defy the odds of capsizing.