1. Sketch No. 17 to illustrate Apendix No. 10 : Diagram of the range of the tides at Iliuliuk, Unalashka, and of the coincident tidal observations showing the march of the tide from Akutan Pass to Iliuliuk, with a sketch of the region in which these and the accompanying current observations were made Yale Public content 1872. 2013-09-05T20:57:01Z. 2013-12-11T23:19:47Z. United States Coast Survey. U.S. Coast Survey. English. cartographic image. Public. Alaska.