Aurora Australis Voyage 2 (ONICE) 1997-98 Underway Data

This dataset contains the underway (meteorology, thermosalinograph, fluorometer and bathymetry) data collected during the Aurora Australis Voyage 2 1997-98. This voyage visited Casey, Mawson and Davis as well as conducting a seal survey. Underway data are available online via the Australian Antarctic Division Data Centre (or via the Related URL section). For further information, see the Voyage Leader's Report or the Marine Science Support Data Quality Report via the Related URL section. The listed scientific objectives from the voyage leader's report were:1) Undertake Antarctic Pack-Ice Seals Project using the ship and helicopters as observation and data collection platforms.2) Support approved bird observations.3) Support approved iceberg observations.General comments and evaluation:The acquisition of the RADARSAT images onboard proved to be quite straightforward and useful, although it was disappointing that the vessel was not in the area of the images at the time of the respective satellite pass.Despite the inability to penetrate the band of oce off casey and the damage to the rudder mechanism, causing the vessel to remain at a very long fly-off distance from Mawson, the voyage achieved most of the goals set. The main downside was that the voyage returned to Hobart six days behind schedule.Of most concern about the voyage, was the uncertainty as to the extent of the damage to the rudder mechanism. This resulted, as mentioned above, the vessel not proceeding any closer to Mawson once the problem was detected, but probably more seriously it was unknown as to how much time would be required to rectify the problem, on return to Australia. This created a heavy workload for the Division in both looking for alternate shipping arrangements and advising expeditioners on revised sailing details.

本数据集收录了1997-1998年“极光号南极（Aurora Australis）第2次航行期间采集的走航数据，涵盖气象、温盐仪（thermosalinograph）、荧光计（fluorometer）与测深仪（bathymetry）相关数据。本次航行先后到访凯西站、莫森站与戴维斯站，同时开展了海豹调查工作。
走航数据可通过澳大利亚南极局（Australian Antarctic Division）数据中心在线获取，亦可通过相关链接板块获取。如需进一步信息，可参阅《航行领队报告》或《海洋科学支持数据质量报告》，相关链接见对应板块。
本次航行领队报告中列明的科学目标如下：
1) 以船舶及直升机作为观测与数据采集平台，实施南极浮冰海豹项目；
2) 支持获批的鸟类观测任务；
3) 支持获批的冰山观测任务。
总体评价与说明：
尽管船上的RADARSAT影像的获取过程相对便捷且颇具价值，但遗憾的是卫星过境时船舶并未处于对应影像的覆盖海域。
尽管无法突破凯西近海的海冰带，且舵机受损导致船舶只能在远离莫森站的远距离待命，本次航行仍达成了多数既定目标。本次航行的主要缺憾是比预定计划晚6天返回霍巴特。
本次航行最令人担忧的问题是舵机受损程度不明：如前所述，该问题被发现后，船舶无法再靠近莫森站；更严重的是，返回澳大利亚后修复该故障所需时长未知，这给澳大利亚南极局带来了繁重的工作负担，包括协调备选航运方案，以及向科考人员通报修订后的航行细节。