derivometern.
/dɛrɪˈvɒmɪtə/ An instrument invented to show a ship's leeway.
ΘΚΠ
society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > other instruments indicating course or leeway
derivometer1842
dromoscope1875
course-indicator1900
1842 Mechanics' Mag. 37 84 Another invention of M. Clement's, which he calls a Derivometer, is an instrument to ascertain a ship's leeway..When at anchor, the instrument will show clearly the direction of the currents.
1928 Times 15 Aug. 13/6 The afterpart of the cabin..contained the derivometer for measuring the airship's deviation from the straight course.
This entry has not yet been fully updated (first published 1895; most recently modified version published online December 2020).
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n.1842- convalescences
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