Original sentence: It was designed to complement the Consolidated PBY Catalina in service.The Martin PBM Mariner was an American patrol bomber flying boat of World War II and the early Cold War period
Edited sentence: It was deliveted as both a flying boat and an anphibian.Its longer range and larger capacity was a welcome advancement of the older Consolidated PBY Catalina in service.The Martin PBM Mariner was an American patrol bomber [seaplane]] of World War II and the early Cold War period