Nonstop flight route between Atwater, California, United States and Los Negros Island, Admiralty Islands, Papua New Guinea:
Departure Airport:

Arrival Airport:

Distance from MER to MAS:
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- About this route
- MER Airport Information
- MAS Airport Information
- Facts about MER
- Facts about MAS
- Map of Nearest Airports to MER
- List of Nearest Airports to MER
- Map of Furthest Airports from MER
- List of Furthest Airports from MER
- Map of Nearest Airports to MAS
- List of Nearest Airports to MAS
- Map of Furthest Airports from MAS
- List of Furthest Airports from MAS
About this route:
A direct, nonstop flight between Castle Airport (MER), Atwater, California, United States and Momote Airport (MAS), Los Negros Island, Admiralty Islands, Papua New Guinea would travel a Great Circle distance of 6,415 miles (or 10,324 kilometers).
A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between Castle Airport and Momote Airport, the route shown on this map most likely appears curved because of this reason.
Try it at home! Get a globe and tightly lay a string between Castle Airport and Momote Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | MER / KMER |
Airport Name: | Castle Airport |
Location: | Atwater, California, United States |
GPS Coordinates: | 37°22'50"N by 120°34'5"W |
Operator/Owner: | Merced County Department of Commerce, Aviation, and Economic Development |
Airport Type: | Public |
Elevation: | 191 feet (58 meters) |
# of Runways: | 1 |
View all routes: | Routes from MER |
More Information: | MER Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | MAS / AYMO |
Airport Name: | Momote Airport |
Location: | Los Negros Island, Admiralty Islands, Papua New Guinea |
GPS Coordinates: | 2°3'42"S by 147°25'27"E |
Area Served: | Lorengau, Manus Province |
Operator/Owner: | PNG National Airports Corporation Limited |
Airport Type: | Public |
Elevation: | 12 feet (4 meters) |
# of Runways: | 1 |
View all routes: | Routes from MAS |
More Information: | MAS Maps & Info |
Facts about Castle Airport (MER):
- The EPA currently has this base listed on their database due to the bulk wastes such as solvents, oils, fuels, and sludges which were disposed in pits at landfills around the base until 1977.
- The furthest airport from Castle Airport (MER) is Tôlanaro Airport (FTU), which is located 11,312 miles (18,204 kilometers) away in Tôlanaro, Madagascar.
- Castle Airport (MER) currently has only 1 runway.
- Castle Air Museum is 500 yards away, displaying over 50 restored World War II, Korean War, and Cold War era aircraft.
- Because of Castle Airport's relatively low elevation of 191 feet, planes can take off or land at Castle Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
- The closest airport to Castle Airport (MER) is Merced Regional Airport (MCE), which is located only 7 miles (12 kilometers) SSE of MER.
Facts about Momote Airport (MAS):
- Occupied on 2 March 1944 by the US Army's 1st Cavalry Division as part of the Battle of Los Negros, which was part of the Admiralty Islands campaign.
- Momote Airport (MAS) currently has only 1 runway.
- The closest airport to Momote Airport (MAS) is Emirau Airport (EMI), which is located 179 miles (287 kilometers) E of MAS.
- The furthest airport from Momote Airport (MAS) is Governador Carlos Wilson Airport (FEN), which is nearly antipodal to Momote Airport (meaning Momote Airport is almost on the exact opposite side of the Earth from Governador Carlos Wilson Airport), and is located 12,028 miles (19,357 kilometers) away in Fernando de Noronha, Pernambuco, Brazil.
- Because of Momote Airport's relatively low elevation of 12 feet, planes can take off or land at Momote Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.