The ob tube has been placed in the ice near mcmurdo the last few years during the early part of the summer season. It has been put in during the winfly period in September and removed in early October when the scientists arrive. Generally it is brought out to one of the field camps on the ice shelf that is inaccessable to us. There is no promise from anyone that it will be installed for the general population, it’s just been a tradition. If you are arriving the first week or so in October you may have a chance to use it. If you are arriving towards the end of October it would almost certainly have been moved. Hope you survive the medical PQ process. I should be leaving toward the end of the first week in October. If you are in town stop by the carp shop and say hi.