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Transferring the hydrophone block and cable to launch for planting.
Radio acoustic ranging operations on the GUIDE
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Image ID: theb2248, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: San Clemente Island area, California
Photo Date: 1925
Credit: C&GS Season's Report Luce 1925
Category: Charting/Navigation/Electronic/Radio-Acoustic Ranging/
• High Resolution Photo Available
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