Glenn L. Martin's Mars aircraft, the largest operational seaplane
manufactured in the United States, had its beginnings based on an
earlier seaplane Mr. Martin built-the Pan American Airlines' "China
Clipper." What began In 1938 as a four-engined "aerial battleship"
carrying ten tons of bombs-complete with a wingspan of 200 feet and a
two-story hull 120 feet long-the XPB2M-1 prototype Mars soon
transitioned to a trans-Pacific transport and air passenger airplane
mostly flying between Naval Air Station Alameda, CA, and Honolulu, HI.
After the prototype, the U.S. Navy ordered 20 more under the JRM
designation, although only six were eventually built. Named Philippines,
Hawaii, Marianas, Caroline, a second Hawaii and Marshall Mars, only two
exist today as static display fire-fighting behemoths at Sproat Lake
near Port Alberni, British Columbia, Canada. This book is the story of
these seven aircraft.