LongitudeA geographic term for the angular distance of a place east or west of the prime meridian
Definitions:
The angular distance between a point on any meridian and the prime meridian at Greenwich.
ChronometerAn instrument for measuring time accurately, often used in navigation and horology.
Definitions:
A highly accurate clock or other timepiece.
NavigationThe process of monitoring and controlling the movement of a craft or vehicle from one place to another
Definitions:
The process or activity of accurately ascertaining one's position and planning and following a route.
MarinerA sailor or seafarer
Definitions:
A person who navigates waterborne vessels or assists in their operation, maintenance, or service.
MeridianA line of longitude, at which the sun is at its zenith at noon.
Definitions:
A circle of constant longitude passing through a given place on the earth's surface and the terrestrial poles.