Largest flying boat in military operation

According to Official Guinness Records,

The largest flying boat ever to become operational is the Martin JRM-3 'Mars', which has a wingspan of 61 m (200 ft) and a maximum takeoff weight of 73,500 kg (162,000 lb). Five were built by the Glenn L Martin Company for the US Navy in the 1940s, and two remain in service as water bombers with the Canadian company Flying Tankers.

For a complete list of 1940 records, please visit 1940 Guinness Records in United States.

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