Igloolik is an island north of the Arctic Circle, part of Nunavut (Canada). Inuit live there surrounded by sea ice much of the year. They mobilize particular know-how to move and orient themselves on the ice, transmitted from generation to generation. The sea ice is not the smooth and solid ice mat imagined: winds, currents, and ice sheets movements form drifts, faults, pressure wrinkles, as many obstacles to the displacements.