Sable Island is approximately 160 km southeast of Canso, the nearest landfall in Nova Scotia. It is located 40 km north of the outer edge of the continental shelf - the shelf edge is indicated by 200m (dotted line) and 1000 m (unbroken line) isobaths. The island is about 45 km west of the Gully, a deep submarine canyon cutting across the shelf edge, and an area of very high productivity and an important habitat for marine mammals. The arrows roughly indicate the positions and directions of the major surface water currents in the region. The position of the Gulf Stream fluctuates seasonally.

Sable Island

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