Core Points - The "Snow Dragon 2" vessel is currently engaged in China's 42nd Antarctic expedition, focusing on delivering supplies to the Zhongshan Station [1][8] - The operation involves navigating through sea ice and requires careful measurement of ice thickness to ensure safe unloading [4][5] - The team has faced challenging ice conditions since entering the dense ice area on November 24, making the unloading operation particularly difficult [7] Group 1 - The unloading operation is led by Yao Xu, who has extensive experience in Antarctic expeditions and is responsible for assessing ice conditions [1][4] - The unloading process involves a convoy of snow vehicles and sleds, with a total weight of approximately 30 tons per snow vehicle [4][5] - Safety protocols dictate that the ice thickness must be at least 1 meter to support the weight of the vehicles and cargo [4][5] Group 2 - After confirming that the ice conditions are suitable, the unloading team proceeded to transport research and living supplies to Zhongshan Station [7][8] - The successful communication of safe ice conditions led to a celebratory announcement among the expedition team [7]

Core Points - The article discusses the successful unloading operation of the Chinese research vessel "Xuelong 2" during its 42nd Antarctic expedition, highlighting the challenges and safety measures involved in unloading cargo on sea ice [1][7]. Group 1: Unloading Operation - The unloading operation involves transporting supplies to the Zhongshan Station, requiring the research vessel to approach as close as possible to the station before transferring goods via ice transport or helicopter [2]. - A convoy of unloading vehicles, consisting of 4 snowmobiles, 13 sleds, and 2 fuel tanks, was prepared for the operation [3]. - The unloading process is initiated after confirming that the ice conditions are safe for unloading, which is critical due to the potential dangers of thin ice [5][7]. Group 2: Safety Measures - The safety of the unloading operation relies heavily on ice thickness measurements, with a minimum thickness of 1 meter required to ensure the safety of the vehicles and cargo [5]. - Prior to the unloading, extensive drilling and measurements were conducted to assess the ice and snow thickness at multiple points to determine a safe unloading route [5]. - The captain and team members closely monitored the ice conditions, and the successful assessment led to a celebratory announcement to the team [6][7].

Group 1 - The 42nd Chinese Antarctic Expedition team has arrived near Zhongshan Station and is actively unloading supplies, with the "Xuelong" and "Xuelong 2" ships meeting for the first time in Antarctica [1] - The "Xuelong 2" ship has successfully transported over 300 tons of polar fuel to Zhongshan Station using a helicopter during favorable weather conditions [1] - Ice unloading operations are being conducted simultaneously, utilizing snow vehicles to transport containers and fuel from "Xuelong 2" to Zhongshan Station and inland bases [3] Group 2 - Nearly 90 team members have already arrived at Zhongshan Station to prepare for subsequent supply reception and research tasks [5] - To enhance operational efficiency, "Xuelong 2" is providing ice-breaking guidance for "Xuelong," which is approximately 32 kilometers away from Zhongshan Station [7] - A large-scale unloading operation involving both ships, helicopters, and snow vehicles is currently underway in Antarctica, with the unloading plan expected to last for two weeks [13] Group 3 - After over 30 hours of continuous ice channel widening and guidance by "Xuelong 2," the "Xuelong" ship, carrying about 1500 tons of supplies for Zhongshan Station, has successfully reached the unloading point [11] - Following the unloading operations, "Xuelong" and "Xuelong 2" will head towards Qinling Station and Great Wall Station, respectively [13]

Core Points - The "Xuelong 2" vessel successfully transported over 300 tons of polar fuel to Zhongshan Station using the "Xueying 102" helicopter during a favorable weather window [2] - The "Xuelong" vessel, carrying approximately 1500 tons of supplies, reached the sea ice unloading point under the continuous operation and guidance of the "Xuelong 2" for over 30 hours [3] - A comprehensive unloading operation involving both land and air is currently underway in Antarctica, with the unloading at Zhongshan Station planned to last for two weeks, after which "Xuelong" and "Xuelong 2" will head to Qinling Station and Great Wall Station respectively [5]