The Last Mars Flying Boat Just Made Its Final Flight

The last of the Martin Mars flying boats just made its final landing, arriving in Arizona, where its eternal resting place will be the Pima Air and Space Museum (PASM). It took off earlier today from San Francisco and touched down in Lake Pleasant, Arizona. From there the iconic aircraft will be partially disessmbled and trucked to PASM for display. It will be one of more than 400 aircraft calling the 80-acre PASM museum home.

Originally developed for the U.S. Navy as a maritime patrol bomber and later reconfigured as a transport ferrying supplies between Hawaii and the Pacific Islands, the Mars family of flying boats found their niche as firefighting water bombers.

Philippine Mars landed in San Francisco on Sunday, making a pit stop on its way to its final destination after leaving its lakeside home in Vancouver, British Columbia. The flying boat was moored alongside the USS Hornet overnight in San Francisco Bay. The retired aircraft carrier now converted into a museum.

Always a beautiful day on the USS Hornet! Yesterday the legendary WWII water bomber, Philippine Mars made a landing near the ship on its way to its final home at Pima Air & Space Museum. A rare sight to see two legends of the second world war, side by side! pic.twitter.com/p3zphVXO6d

— USS Hornet Museum (@HornetMuseum) February 10, 2025

Coulson’s Aviation Philippine Mars docking at the historic ex-NAS Alameda after the first leg of it’s Retirement Tour. pic.twitter.com/hmtiadbOu1

— Patriotic Capybara (@USAcapybara) February 10, 2025

Historic visit of Philippine Mars at Alameda Naval Air Station after so many years, on its way to the Pima Air & Space Museum for permanent display. #coulsonaviation @CoulsonAviation pic.twitter.com/IZvDeGC24k

— CTP Watcher ✈️ (@WatcherCtp) February 10, 2025

The Philippine Mars is on the move! After departing Sproat Lake yesterday, the aircraft is set to leave San Francisco today between 11–12 PT, continuing its journey to Arizona. Stay tuned for updates as it makes its way to its final home! 🌵✈️#philippinemars #coulsonaviation pic.twitter.com/EkgMCtIj7Y

— Coulson Aviation (@CoulsonAviation) February 10, 2025

Philippine Mars took off on its final flight around noon local time today, passing over the Golden Gate Bridge and then south along the California coast before a more overland route after reaching Monterey Bay according to the FlightRadar tracking site. For a good part of the day, it was the site’s most closely followed aircraft.

The legendary Philippine Mars is on her way to Arizona, and thanks to our partnership with SKYTRAC, you can track her journey in real time!  #coulsonaviation #philippinemartinmars 

📍 Track her progress here: https://t.co/Giv1mJwYdm pic.twitter.com/x65yHOpZeY

— Coulson Aviation (@CoulsonAviation) February 9, 2025

And lift off your of Philippine Mars C-FLYK from Oakland, next stop Arizona. #philippinemars #martiamars #cflyk #flynavy #pimaairandspacemuseum #aviationsafari #aviationpreservation #boneyardsafari #aviationadventures pic.twitter.com/ZkB0nq43ur

— Boneyard Safari (@Boneyardsafari) February 10, 2025
The flight path of Philippine Mars, which took off from San Francisco today. (FlightRadar screencap)

In 2007 Coulson Aircrane Ltd. purchased Philippine Mars and its sister aircraft, Hawaii Mars “to expand its firefighting capabilities, establishing itself as the only operator at the time operating both fixed wing and rotary wing firefighting aircraft,” according to the company.

The Martin Mars flying boats were unique aircraft.

With a wingspan of 200 feet and a length of more than 117 feet, the Mars — in its ultimate configuration — tipped the scales at 165,000 pounds at its maximum takeoff weight. It was powered by four Wright R-3350 Duplex-Cyclone radial engines, each producing 2,500 horsepower. 

 

A three-view line drawing of the Martin JRM-1 Mars, from the Bureau of Aeronautics, Navy Department, dated August 1948. (Public Domain)

There were seven Martin Mars flying boats, all produced between 1942 and 1947, according to Coulson.

“The surviving fleet of four aircraft were sold in 1958 to a consortium of timber companies in British Columbia, Canada, and converted into the world’s largest waterbombers carrying 7,200 U.S. gallons per drop,” according to Vintage Aviation News.

“The Mars fleet flew cargo between Hawaii and the Pacific Islands to support the U.S. Navy during World War II,” the company explained. “After the war, they supported the Korean War with medical air transport lifts between Hawaii and California, later transitioning to cargo lift work between Hawaii and California before being decommissioned in 1956.”

The Philippine Mars when it flew for the Navy in World War II. (USN)

The surviving fleet of four aircraft was sold in 1958 “to a consortium of timber companies in British Columbia, Canada, and converted into the world’s largest waterbombers carrying 7,200 U.S. gallons per drop.” 

Coulson purchased two of the aircraft, the Hawaii Mars and the Philippine Mars, in 2007, which marked the beginning of the company’s fixed-wing air tanker operations for aerial wildfire support. 

The Mars water bombers “served the Province of British Columbia from 1960-2015 and over the span of 55 years dropped over 50 million gallons each which is more water on fires than any other single firefighting aircraft in history anywhere in the world.”

The aircraft were put up for sale nearly a decade ago, but nobody bought them. Eventually, they were fully retired as the cost to fly and maintain them grew.

A deal was later worked out to send Philippine Mars to PASM. As we previously reported earlier this year, its sister ship, Hawaii Mars, made a two-hour flight to its new home at the B.C. Aviation Museum in Sidney on Vancouver Island.

Now that Philippine Mars has arrived in Arizona, there will be no more majestic Mars flying boats to ever grace the skies again, marking the end of an aviation era.

Contact the author: howard@thewarzone.com