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.
Since the equator is a circle, we can divide it--like any circle--into 360 degrees, and the longitude Ï of a point is then the marked value of that division where its meridian meets the equator. | Longitude lines or meridians What that value is depends of course on where we begin to count--on where zero longitude is.