Which technique should a pilot use to scan for traffic to the right and left during straight-and-level flight? How can you determine if another aircraft is on a collision course with your aircraft? What preparation should a pilot make to adapt the eyes for night flying?
Because of this designation, longitude is measured in degrees west or east of the Prime Meridian. For example, 30Â°E, the line passing through eastern Africa, is an angular distance of 30Â° east of the Prime Meridian. 30Â°W, which is in the middle of the Atlantic Ocean, is an angular distance of 30Â° west of the Prime Meridian.
Quick Answer. The prime meridian passes through the United Kingdom, France, Spain, Algeria, Mali, Burkina Faso, Ghana and Togo. The prime meridian represents the longitude of 0 degrees. The prime meridian was established as 0 degrees longitude in 1884 at an international conference. Prior to 1884, countries established their own local starting locations for longitude, but the increase of international commerce led to the need for a standardized prime meridian. The United Kingdom and its former colonies set the Royal Observatory at Greenwich, located outside of downtown London, as the starting location for longitude in 1675.