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.
The Prime Meridian is the meridian (line of longitude) at which the longitude is defined to be 0Â°. The Prime Meridian and its opposite the 180th meridian (at 180Â° longitude), which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern and Western Hemispheres. The Equator is the line of latitude at which the latitude is defined to be 0Â°.