Portion of hydrographic survey sheet showing Tongue Point, just to the east ofAstoria Oregon. The sheet shows configuration of shoreline, visual signals usedfor positioning survey vessels, soundings in fathoms graduated to 1/4 fathoms,colored contour
4/3/2019 11:57:13 AM
Location: Oregon, Columbia River, Tongue Point
Subject: Coast and Geodetic Survey
Subject: Archive Hydrographic Survey