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1989 Map of Unalaska C-1
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1989 Map of Unalaska C-1

USGS Topo · Published 1989

About this map

Unalaska Island and Sedanka Island dominate this late-twentieth-century maritime survey of the Aleutian chain. The landscape is defined by its dramatic coastal indentations, notably Beaver Inlet and Udagak Strait, which separate these landmasses. The map details the intricate waterways used for navigation between the Bering Sea and the Pacific Ocean, including the treacherous Unalaska Pass and the narrow Baby Pass near the Baby Islands. Named coastal landmarks such as Erskine Point, Fishermans Point, and Brundage Head provide essential orientation points along the rocky shorelines. On Unalga Island, the terrain rises toward peaks like Malga Bay's surrounding heights, while Sedanka Island features prominent signals at Inner Signal and Outer Signal, likely indicating its importance for regional maritime safety and communication in the 1980s.

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Map Details

Date Portrayed1989
Date Published1989
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:63,360
Physical Dimensions18 x 21.9 inches

Editions of this 1989 Unalaska C-1 Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain