Aurora Australis Voyage 1 (MONGREL) 1992-93 Underway Data

This dataset contains the underway data from Voyage 1 1992-93 (MONGREL) of the Aurora Australis. This voyage visited Mawson and Davis, leaving from and returning to Hobart. From the voyage leader's report:The first voyage of the 1992-93 season left Hobart on 17 October on board the Aurora Australis for Mawson and Davis Ice Edges, and Sea Ice Program research activities in the Prydz Bay region. On board were a total of 97 expedition personnel, including 44 for Mawson, 42 for Davis and 11 round trippers.The journey to the ice edge north of Mawson took just over 16 days, primarily because of particularly heavy ice conditions in the approach to Mawson and bad weather. On the morning of the 31 October, a blizzard forced the ship to stop in the ice as visibility was less than a few hundred metres in driving snow. The barometer reached its lowest ever recording on Aurora to that time, 940.6 Hpa, although the wind only reached 55 knots in gusts.When conditions improved, the ship proceeded again and finally reached the fast ice edge 55 km north of Mawson on the morning of 2 November. Just over three days were spent at the ice edge, the period being marked by frequent periods of low cloud and whiteout. All required personnel were transferred to and from the ship and nineteen huskies bound for the United States were taken on board. The limited opportunities for aircraft operations and the very poor condition of the Mawson-ship fast ice route resulted however in only very high priority cargo being delivered to the station.The vessel departed the Mawson ice edge on the afternoon of 5 November, working its way north then east in to Prydz Bay. Heavy ice conditions continued to be experienced, and this coupled with poor visibility and large amounts of snow lying on the ice (both which considerably restricted the ability to choose the best route through the ice), made progress slow. Some two days were spent in Prydz Bay conducting sea ice research, including the deployment of two buoys, and the Aurora reached the ice edge off Davis on the morning of 10 November.The ship took almost twelve hours to break through the heavy fast ice present at Davis to reach the optimum position for the pumping of station fuel ashore. A large amount of dry cargo was discharged over two days and the majority of RTA cargo awaiting on the station (mainly rubbish) back-loaded. Aurora left the ice edge at Davis on the afternoon of 12 November and after pushing north through, at times, heavy pack ice, the voyage to Hobart was smooth, and the vessel reached there late on the afternoon of 23 November.

本数据集包含“南极光号（Aurora Australis）”1992-1993年度第1航次（代号MONGREL）的航次实时观测数据。本次航次先后造访莫森站与戴维斯站，往返均以霍巴特港为起止港。

译自航次领队报告：1992-1993科考季的首次航次于10月17日从霍巴特港搭乘南极光号出发，前往莫森站、戴维斯站海冰边缘区，以及普里兹湾海域开展海冰计划相关科考作业。船上总计搭载97名科考队员，其中44人前往莫森站，42人前往戴维斯站，另有11人为全程随航往返人员。

前往莫森站北侧海冰边缘的航程耗时逾16天，主要原因是莫森站进港海域海冰密集度极高，且伴随恶劣天气。10月31日清晨，暴风雪导致科考船被迫停航于冰区：当时吹雪致使能见度不足数百米。此期间，南极光号的气压计记录下当时史上最低值——940.6百帕（Hpa），阵风风速仅达55节。

待海况与能见度改善后，科考船继续航行，最终于11月2日清晨抵达莫森站北侧55公里处的固定冰边缘。科考船在海冰边缘停留逾3天，期间频繁出现低云与乳白天空现象。

期间完成了所有所需人员的往返转运，同时搭载了19只将运往美国的哈士奇雪橇犬。但受限于航空作业窗口期极少，且莫森站与科考船间的固定冰通行条件极差，最终仅能将极高优先级的物资运抵站点。

11月5日下午，科考船驶离莫森站海冰边缘，先向北航行再向东驶入普里兹湾。航区仍遭遇密集海冰，加之能见度不佳、冰面积雪厚重——二者均极大限制了最优冰区航线的选择空间，导致航行进度缓慢。

科考船在普里兹湾耗时约2天开展海冰科考作业，包括投放2个浮标，最终于11月10日清晨抵达戴维斯站外海冰边缘。科考船耗时近12小时破开戴维斯站海域的厚重固定冰，抵达可向站点泵送燃油的最优位置。

两天内完成了大量干货的卸货作业，并将站点待运的大部分RTA货物（主要为站内垃圾）回运装载上船。11月12日下午，南极光号驶离戴维斯站海冰边缘，在穿越不时出现的厚重浮冰群后向北航行，返程霍巴特港的航程十分顺利，最终于11月23日傍晚抵达霍巴特港。