Lightship WAL-604, "Columbia"Lightship WAL-604, "Columbia"

Retired in 1979 as the last lightship to be stationed at the Columbia River Bar — or anywhere on the Pacific coast of the United States — WAL-604 retains the best historic integrity of the last generation of U.S. Coast Guard lightships after 1939. WAL-604, built in 1950, and its relatives closely resembled earlier lightship types in external appearance, but were a distinct departure in their overall design. Photo: BigBen212, CC BY-SA 4.0, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:LightshipColumbia.jpg)