Adamson Rocks (48°54'N., 125°08'W.), a group of above and below water rocks, lie close off the NW side of Fleming Island. Breakers mark these rocks in rough weather. A detached reef, with a depth of 8.8m, lies in the fairway of Imperial Eagle Channel, about 1.5 miles WNW of this group and 1.5 miles SW of Swiss Boy Island. The latter island lies at the SW end of the Chain Group of islands which parallel the NW coast of Tzartus Island, about 0.8 mile offshore.

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