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 zero degrees longitude line is called the Prime  Meridian. When the Prime Meridian is combined with the  meridian of 180 degrees longitude, the two meridians together fo â¦ rm  a circle that divides the Earth into the Eastern and Western  Hemispheres.