It's a bird, it's a plane, it's... Proteus

Proteus is a prototype wave adaptive modular vessel.

Powered by two 355 horsepower diesel engines, it has a range of 5,000 miles and reaches a top speed of 70 mph.

It visited New York Harbor this past week prior to embarking on its One Ocean mission through America's national marine sanctuaries.

Here's a press release that appeared on TechWeb.

Marine Advanced Research built Proteus; its website has lots more detail.