Longitude by chronometer
Overview
Navigation
Navigation is the process of monitoring and controlling the movement of a craft or vehicle from one place to another. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks...
method of calculating the longitude of an observer's position on Earth. The longitude derived by this method must be combined with the latitude of the observer's position (derived through some other method) to resolve a "fix
Fix (position)
In position fixing navigation, a position fix or simply a fix is a position derived from measuring external reference points.The term is generally used with manual or visual techniques such as the use of intersecting visual or radio position lines rather than the use of more automated and accurate...
" or exact position of the observer on the Earth.
Determining longitude by use of a chronometer
Chronometer
Chronometer may refer to:* Chronometer watch, a watch tested and certified to meet certain precision standards* Hydrochronometer, a water clock* Marine chronometer, a timekeeper used for celestial navigation...
is perhaps the easiest method of determining longitude, albeit one of less accuracy than other methods.
