1.5 mi. N of Umnak Island and 6 mi. W of Cape Tanak, Aleutian Is.;
Named in 1939 by U.S. Coast and Geodetic Survey (USC&GS) because "light tide rips and swirls occur over the shoal on changes of tide."
Aguliuk Point, Ashishik Point, Cape Chagak, Cape Tanak, Fox Point, Reindeer Point,
Cliffs:Craters:Mountains:Jag Peak, Mount Okmok, Tulik Volcano,
Ridges:East Arcuate Ridge, North Arcuate Ridge,
Streams:Colorado Creek, Connecticut Creek, Crater Creek, Delaware Creek, Ginger Creek, Nest Creek, New York Creek,
Valleys:Cities: