calculation of one's position on the basis of distance run on various headings since the last precisely observed position, with as accurate allowance as possible being made for wind, currents, compass errors, etc.
one's position as so calculated.
Origin of dead reckoning
[ded-rek-uh n] /ˈdɛdˈrɛk ən/
verb (used with object), Navigation
to calculate (one's position) by means of dead reckoning.