Boats from HMS EREBUS and HMS TERROR - Captain James Clark Ross.Sounded in open ocean at 27.43 S and 17.48 W.Recorded depth of approximately 2200 fathoms.First modern successful sounding in deep ocean
4/3/2019 10:36:25 AM
Date: 1840
Credit: NOAA Central Library
Location: South Atlantic Ocean Photo
Subject: Charting
Subject: Soundings
Subject: Bathymetry
Subject: Mechanical
Subject: