Martin JRM-3 Mars Heavy Flying Boat The Martin JRM-3 Mars is one of the largest flying boats ever built. Designed for long-range naval transport, powered by four radial engines, and capable of water-based operations. #MartinMars #JRM3 #FlyingBoat #Seaplane #NavalAviation #AviationHistory #RadialEngines #MilitaryAircraft | Just Flow Time

The final flight of the last Martin JRM Mars flying boat took place on February 10, 2025, as the "Philippine Mars" lifted off from San Francisco Bay on its way to the Pima Air and Space Museum in Tucson, AZ. #aviation #aviationphotography #finiflight #lastflight | Norman Graf Aviation Photography

The Hawaii Mars flying boat is one of the five large Martin JRM Mars-class seaplanes built by Martin Corporation. Designed as Bombers. Long range seaplanes of this type have impressive dimensions : wingspan 61 metres, length 36 metres, height 12 metres. | Defence Express