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Palmer is one of three U.S. Antarctic stations governed by the Antarctic Treaty. The station, built on solid rock near a glacier, is a cluster of approximately five buildings. The station operates in conjunction with a research vessel. Since the late 1990s the ARSV Laurence M. Gould has conducted year-round polar operations, sailing frequently between Punta Arenas, Chile and Palmer Station. Approximately 40-45 people occupy Palmer in the summer. 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