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The aptly named Ego semisubmarine has a two-person “cabin” with 20mm-thick acrylic windows beneath twin floats that’s entered through a topside hatch.

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Built in South Korea, the electric vessel is helmed from inside the cabin and has a top speed of 5 knots for four hours of underwater viewing. Retail pricing had not been determined when it was shown at the Miami International Boat Show.

This article originally appeared in the May 2012 issue.