Cable drum being pulled by horses across dunes.Cable lead to offshore hydrophone for Radio Acoustic Ranging.On the GUIDE
3/20/2019 12:32:34 PM
Date: 1924
Credit: C&GS; Season's Report Luce 1924-49
Location: Oregon, Cape Blanco area
Subject: Charting
Subject: Navigation
Subject: Electronic
Subject: Radio-Acoustic Ranging