echometern.
(See quot. 1842.) Also, a type of echo-sounder.
ΘΚΠ
society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > depth-finder
depth recorder1911
depth finder1923
Fathometer1925
echo-sounder1927
echometer1937
1736 N. Bailey et al. Dictionarium Britannicum (ed. 2) Echometre.
1842 W. T. Brande Dict. Sci., Lit. & Art 381/1 In Music, a sort of scale or rule, marked with lines, which serve to measure the duration of sounds, and to ascertain their intervals and ratios.
1881 Worcester's Dict. Eng. Lang.
1937 Nature 18 Sept. 499/1 An ‘echometer’ depth sounder.
1937 Nature 25 Sept. 553/2 Another exhibit..shows how one type of echometer can indicate to a trawler the depth of the sea-bed and also that at which a shoal of fish may be passing.
1961 Times 2 June 14/7 Dry-paper recording echometer.
This entry has not yet been fully updated (first published 1891; most recently modified version published online December 2020).
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