USS VINCENNES in pack ice - Captain Charles Wilkes commanding.On the Antarctic shelf, Wilkes sounded with copper wire in 400 fathoms.First use of wire instead of hemp sounding line.Copper too ductile and would break - gave up on idea
4/8/2019 11:48:07 AM
Date: 1840
Credit: NOAA Central Library
Location: Antarctica, Wilkes Land
Subject: Charting
Subject: Soundings
Subject: Bathymetry
Subject: Mechanical