Mode C veil refers to a kind of airspace which surrounds most of primary Class B airports within United States. This airspace extends horizontally to a circle of 30 NM radius centered on the airport and extends vertically from the surface up to 10,000 feet MSL. The name refers to the mode of transponder operation which is required within this airspace. Out of 37 existing (as of late 2012) Class B airports in the United States, 35 airports (i.e., all but 2) have Mode C veil centered on them. The only two that don't are Houston Hobby Airport and Miramar Naval Air Station.
Famous quotes containing the words mode and/or veil:
“There are a thousand hacking at the branches of evil to one who is striking at the root, and it may be that he who bestows the largest amount of time and money on the needy is doing the most by his mode of life to produce that misery which he strives in vain to relieve.”
—Henry David Thoreau (1817–1862)
“When will the veil be lifted that casts so black a night over the universe? God of Israel, lift at last the gloom: For how long will you be hidden?”
—Jean Racine (1639–1699)