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.
7 Continents, 5 Oceans and Desert Information. The prime meridian is the longitude line of zero degrees that is officially recognized as being at the Royal Observatory in Greenwich, London. There was a time when there were multiple prime meridians, as recognized by different countries since a prime meridian can technically be any longitude line.