A U.S. Air Force C-17A Globemaster III turned back to Christchurch, New Zealand, after receiving a notice warning of potentially hazardous space activity during a flight to Antarctica this week. The notice concerned a potential hazard to international airspace within New Zealand’s Oceanic Flight Information Region, not a hazard location established as being near Antarctica.
The aircraft, operating under the call sign ICE28, departed Christchurch International Airport at about 9 a.m. local time Tuesday and returned at approximately 11:30 a.m., according to flight-tracking data cited by Defense News. The C-17 had been en route to Antarctica when it received the warning.
New Zealand’s Civil Aviation Authority issued the Notice to Airmen, or NOTAM, after receiving information from the Russian Air Traffic Management Corporation about a planned missile launch and associated potential hazard to international airspace. The authority also established a danger area in response to the notification.
A NOTAM alerts aircraft operators to conditions that could affect flight operations. Such notices provide information for operators to use when making decisions about flight planning. The authority said aircraft are not automatically prohibited from flying through an area covered by a notice.
The relevant Oceanic Flight Information Region covers about 30 million square kilometers of international waters across the South Pacific Ocean, Southern Ocean and Tasman Sea. Because much of the region lies over international waters, New Zealand has limited control over activities there. Airspace authorities and air traffic service providers commonly issue NOTAMs after receiving notifications about potential hazards.
The aircraft’s return occurred during the U.S. Air Force’s annual Winter Fly-in period, known as WinFly. The seasonal operation uses Christchurch as a gateway for flights supporting Antarctic science programs. WinFly typically takes place toward the end of August and delivers teams, equipment and cargo to McMurdo Station and Scott Base ahead of the Antarctic research season.
A U.S. Pacific Air Forces spokesperson described the flight as a routine resupply mission scheduled for this time of year but did not say whether the specific flight was directly supporting WinFly. Christchurch supports operations and logistical activity by the U.S. Air Force and New Zealand Defence Force connected with Antarctic science programs.
The C-17A Globemaster III is a military cargo aircraft used to transport personnel and cargo. Its capabilities include delivery to main and forward operating bases, tactical airlift, airdrop missions and aeromedical evacuation. In the Antarctic support mission, C-17 flights operate from Christchurch to move supplies and personnel to remote research facilities.
The notice and the aircraft’s subsequent return linked the week’s flight interruption to a potential space-related hazard identified within New Zealand’s broad Oceanic Flight Information Region. The available flight information establishes that the aircraft was traveling to Antarctica and returned to Christchurch after receiving the warning, while the hazard notification itself covered airspace within the region administered for flight-information purposes by New Zealand.