At 360 pre-selected points, the ship stopped to take scientific readings: weighted ropes were used to measure the ocean depth, collection jars were used to scoop up bottom sediments and water samples, trawling nets were used to capture fish and dredges were used to collect sea floor life for study, and instruments were used to measure salinity and temperature at various depths.
Don Walsh born November 2, 1931 is an American , explorer and marine policy specialist.
He has spent over 50 years in oceanic research, and is celebrated by Life magazine as one of the world's great explorers.
It additionally mentions some Longines stopwatches, however extra afterward this matter.
Naval Historical past and Heritage Command web site.
Most concerning of all though is the pressure.