The last U.S. Air Force transport aircraft returned home on March 7, marking the end of another successful summer season in Christchurch, New Zealand.
From this crucial gateway, the Air Force executed multiple flights to Antarctica in support of the National Science Foundation's research program.
This year’s Antarctic operation stood out for two significant reasons. Firstly, the Air Force introduced a new aircraft platform to its fleet, supplementing the usual Lockheed Martin LC-130H Hercules “skibirds” and Boeing C-17A Globemaster IIIs.
The addition of C-130Hs from the Nevada Air National Guard provided vital transport capabilities to one of the world's most inhospitable regions.
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Lt. Col. Jack Smith, Commander of the 304th Expeditionary Airlift Squadron, Antarctic Operations, elaborated on the role of these aircraft, explaining why they were deployed.
“There’s a C-17 gap season, from about the 5th of December through the third week of January, where we don’t operate because the runway gets too soft,” he noted. “But the C-130 can start operating earlier because they’re smaller and lighter, so that they have an option to move passengers north and south during those gap periods.”
Although the C-17 has a larger cargo capacity, Smith pointed out that the C-130Hs were more cost-effective.
“It’s a small airplane, less fuel,” he said, noting that they are also more efficient than the LC-130, which, due to its ski-equipped design, burns 25% more fuel than a C-130H.
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The second key feature of this year’s Operation Deep Freeze, the long-running Antarctic support mission initiated in 1955, was the effort to rebuild a critical pier at McMurdo Station. This pier, which shattered previously, is essential for unloading cargo and supplies.
The C-17s were instrumental in delivering heavy equipment, including cranes and drilling rigs, to support the Navy Seabees tasked with the reconstruction. Smith detailed the logistics behind these efforts: “Bulk supplies and fuel arrive by icebreaker ships. Last year the U.S. moved 90 million pounds of cargo to the continent, of which 85 million arrived by sea.”
Flying to Antarctica presents numerous challenges, with weather being the most significant. Conditions at McMurdo Station are notoriously unpredictable, and aircraft may develop technical issues midflight. These difficulties sometimes result in “boomerangs,” where an aircraft must return to Christchurch before reaching its destination.
“They reach a point, we call it a point of safe return, you get to that point and you have to make a decision based on the weather forecast,” Smith explained.
Throughout the summer season, which spans from October to early March, different aircraft play specific roles.
“So the LC-130s will be here pretty much that whole time operating, and they’re mostly doing intra-theater airlift,” Smith said, referring to their shorter-haul missions between McMurdo and other Antarctic sites.
“Our focus is Christchurch to and from McMurdo,” he added regarding the C-17s.
Additional challenges include communication issues, as high-frequency radios may not function reliably in the far south. Pilots must also contend with potential spatial disorientation due to the stark white landscape blending into the sky.
Despite these obstacles, Smith remarked that landing on the ice runway at Phoenix Airfield in McMurdo is not significantly different from wet runway conditions back in Christchurch. “It’s similar to a wet runway – so if the runway here in Christchurch is wet, that’s pretty similar to what we experience at Phoenix.”
While emergency airdrops occasionally take place, there were none during this summer rotation. A C-17 mission to Antarctica typically lasts 16-18 hours, with each aircraft crewed by four pilots, four loadmasters, and two flying crew chiefs.
The missions also provide an opportunity to train and qualify crews. Between October and November 2024, C-17s completed 24 missions, with an additional eight occurring in early 2025. Another midwinter mission is scheduled for August, when the continent is shrouded in darkness.
Smith’s 304th Expeditionary Airlift Squadron operates under the 62nd Airlift Wing, based at Joint Base Lewis-McChord, Washington. All aircraft involved in Operation Deep Freeze fall under the jurisdiction of Joint Task Force – Support Forces Antarctica, headquartered in Hickam, Hawaii.
Smith led a team of 38 personnel on the C-17A side of the operation this year. The selection process for these missions is competitive, as participation is seen as an incentive for high-performing Air Force personnel.
“They use it as kind of a reward to their top performers within their squadrons back home. So we build a team out of all the high performers each rotation from back at McChord. So it makes my job easy – I have a bunch of really, really talented folks working out here,” Smith said.
The aging fleet of ski-equipped LC-130H Hercules, operated by the New York Air National Guard, will soon require replacement. According to an Air Force source, the next aircraft will likely be based on the C-130J.
However, regular U.S. Air Force C-130Js lack the wing fuel tanks necessary for Antarctic missions, a limitation not faced by New Zealand’s Air Force, which has already deployed its new C-130J-30s to the continent.
Despite shifting Pentagon priorities, the Air Force’s role in Operation Deep Freeze remains secure. For scientists stationed in Antarctica, there is no alternative for receiving urgent supplies.
This was underscored when Smith piloted one of the final flights of the season—a C-17 emergency mission to evacuate a medical patient from McMurdo Station, highlighting the life-saving importance of these Antarctic operations.
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