An estimated 3,100 large vessels thread between the islands each year on their way west, and a similar number travel the eastward route across the North Pacific just south of the Aleutians.

• 据估计，每年西行的船只中，有3100艘会在各个岛屿间穿梭，还有差不多数目的船只穿过北太平洋（距阿留申群岛也不远），向东面航行。