The Martin Ocean Transports.-

The Martin M-130 was a commercial flying boat designed and built in 1935 by the Glenn L. Martin Company in Baltimore, Maryland, for Pan American Airways. Only three M-130s were built: the China Clipper, the Philippine Clipper and the Hawaii Clipper. A fourth flying boat (designated as M-156) called the Russian Clipper was built for the Soviet Union which was essentially identical to the three Pan Am models except that it had a larger wing (giving it a longer range) and twin vertical stabilizers. Martin designated them as the Martin Ocean Transports, but to the public they were all referred to as the China Clipper, a name which evolved into a generic term for Pan Am's entire fleet of large flying boats.

The Glenn L. Martin Company was an American aircraft and aerospace manufacturing company that was founded by the aviation pioneer Glenn Luther Martin on August 16, 1912. The Martin Company produced many important aircraft for the defense of the United States and its allies, especially during World War II and the Cold War.

Martin started out building military trainers in Santa Ana, California, and then in 1916, Martin accepted a merger offer from the Wright Company, creating the Wright-Martin Aircraft Company in September. This new company did not go well, and Glenn Martin left it to form a second Glenn L. Martin Company on September 10, 1917. This time based in Cleveland, Ohio. Later, its headquarters would be moved to Baltimore, Maryland.

During the 1950s and 60s, the Martin Company moved gradually out of the aircraft industry and into the guided missile, space exploration, and space utilization industries. In 1961, the Martin Company merged with the American-Marietta Corporation, a large sand and gravel mining company, forming the Martin Marietta Corporation. Then, in 1995, Martin Marietta merged with aerospace giant Lockheed to form the Lockheed Martin Corporation.