The Aeromarine 700 was a prototype amphibious aircraft developed by the Aeromarine Plane and Motor Company in the early 1930s. It was designed as a long-range, high-speed transport aircraft that could operate from both water and land runways.

The Aeromarine 700 was a large, four-engine flying boat with a metal hull and fabric-covered wings. It had a crew of four and could carry up to 16 passengers or 3,000 pounds of cargo. The aircraft was powered by four Pratt & Whitney R-1860 Hornet engines, which gave it a top speed of around 150 miles per hour and a range of 1,500 miles.

The Aeromarine 700 was designed to compete with other large transport aircraft of the era, such as the Boeing 314 Clipper and the Sikorsky S-40. However, the prototype was not successful in flight testing, and only one aircraft was built. The project was eventually abandoned, and the Aeromarine Plane and Motor Company went out of business in the mid-1930s.

Despite its lack of success, the Aeromarine 700 was an ambitious and innovative design for its time, and demonstrated the potential of amphibious aircraft for long-range transport and commercial use.