0 a way of calculating the position of a ship or aircraft using only information about the direction and distance it has travelled from a known point --
Longitude was predicted by dead reckoning, an impossible task given the storm conditions, strong currents and length of time involved.
The case is often referred to as an instance of the extreme uncertainty of the determination of longitude by dead reckoning only.
The airships relied largely on dead reckoning, supplemented by a radio direction-finding system of limited accuracy.
They have to rely on dead reckoning to do that.
In addition, radar, satellite, the global positioning system and visual fixes, dead reckoning and electronic route following can be used.
Two different types of locations are possible: dead reckoning location or absolute location.
The evidence adduced includes observations of usage (including gestures), experimental tasks in spatial memory, dead reckoning, statistical analysis of aggregate results, and a good dose of linguistic analysis.
They are effectively dead reckoning all the time.
