The width of a Federal Airway from either side of the centerline is?

The width of a Federal Airway is indeed 4 nautical miles (NM) from the centerline, making the total width of the airway 8 NM. Federal Airway routes are designated as part of the U.S. air traffic control system and serve to manage aircraft navigation between airports at altitudes generally from 1,200 feet above the ground to 18,000 feet above sea level.

Understanding this width is essential for pilots because it helps in maintaining the proper clearance from the airway centerline during navigation and ensures safe separation from other aircraft that may be using adjacent airspace. Knowing the dimensions allows pilots to effectively plan their routes to avoid airspace conflicts and manage their flight paths accurately.

The option stating a width of 2 NM from each side of the centerline would imply a narrower corridor, which does not reflect the designated dimensions for Federal Airways. Similarly, a width of 8 NM or 10 NM would represent larger than the standardized measurements and would create potential for confusion regarding aircraft separation and navigation procedures.