This article describes the logistical challenges and initial data sets from geophysi-
cal seismic refl ection, seismic refraction, and hydrographic surveys in the Canada Basin
conducted by scientists with U.S. and Canadian government agencies (Figure 1a) to ful-
fill the requirements of the United Nations Convention on the Law of the Sea to deter-
mine sediment thickness, geological origin, and basin evolution in this unexplored part of
the world. Some of these data were collected using a single ship, but the heaviest ice condi-
tions necessitated using two icebreakers, similar to other recent Arctic surveys [e.g.,
Jokat, 2003].