1963 Map of False Pass D-0

About this map

Outer Iliasilk Island and the scattered outcroppings of the Pacific Ocean dominate this maritime survey of the Aleutian waters. Grounded in data from mid-century aerial photography and hydrographic charts, the map reveals a treacherous coastal environment defined by submerged hazards and isolated landmasses. Navigational landmarks like Pinnacle Rock and the extensive Sandman Reefs are meticulously positioned, reflecting the critical importance of these features for seafaring safety in the late 1950s and early 1960s. Small, named islands such as Sushilnoi Island and Rose Island emerge from the depth contours, while named obstructions like Olga Rock and John Rock sit as solitary sentinels in the open sea. This documentation provides a precise record of the shoreline and depth soundings as they were recorded before later 20th-century revisions.