The use of a tension meter or dynamometer for deep-sea dredging and coring is common practice on oceanographic vessels (Sigsbee 1880: 159–160, Thomson and Murray 1885: 61–63, Soule 1949: 49–50, Kullenberg 1955). However, in deep water, variations in wire tension that indicate bottom contact are frequently masked by the "background" of tension fluctuations due to the ship's motion....
Sachs, Peter L.. 1964. "A tension recorder for deep-sea dredging and coring." Journal of Marine Research 22, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1037