A U.S. Air Force C-17A Globemaster III turned back to Christchurch, New Zealand, after receiving a notice about potentially hazardous space activity during a flight to Antarctica this week. The aircraft, operating under the call sign ICE28, departed Christchurch International Airport at about 9 a.m. local time Tuesday and returned roughly two and a half hours later, based on flight-tracking data cited by Defense News.
New Zealand’s Civil Aviation Authority issued the Notice to Airmen, or NOTAM, after receiving a warning from the Russian Air Traffic Management Corporation. The warning concerned a planned missile launch and an associated potential hazard to international airspace within New Zealand’s Oceanic Flight Information Region, the authority said.
The CAA responded by establishing a danger area and alerting aircraft operators to the potential hazard. The notice itself did not bar aircraft from entering the area. Instead, it provided information for operators to use in making decisions about flight planning and whether to proceed, alter a route or return to an airport.
The CAA described the action as standard practice when airspace authorities and air traffic service providers receive a hazard notification. Much of the relevant flight information region lies over international waters, including areas across the South Pacific Ocean, Southern Ocean and Tasman Sea. The authority said that area covers roughly 30 million square kilometers and that New Zealand has limited control over activities there.
The flight was described by a U.S. Pacific Air Forces spokesperson as a routine resupply mission scheduled for this time of year. Christchurch serves as a staging point for U.S. Air Force and New Zealand Defense Force operations and logistical support connected to Antarctic science programs, the spokesperson said.
The turnaround occurred during the period associated with the U.S. military’s annual Winter Fly-in, or WinFly. That seasonal operation normally moves teams, equipment and cargo to McMurdo Station and Scott Base before the main Antarctic research season. Pacific Air Forces did not say whether the specific flight was directly supporting WinFly.
WinFly is part of the logistical structure supporting Operation Deep Freeze, which provides assistance to the U.S. Antarctic Program managed by the National Science Foundation. A 2012 Air Force release cited in the report said a C-17 mission delivered more than 300 passengers and 230,000 pounds of cargo to Antarctica that year, illustrating the type of work performed from Christchurch during the seasonal buildup.
The C-17A is a heavy airlift aircraft used to move personnel and cargo to operating bases and forward locations. Its listed missions also include tactical airlift, airdrop operations and aeromedical evacuation. In this case, the aircraft’s return followed the hazard notification issued for the flight region rather than a prohibition that automatically closed the airspace.