What action is required when two aircraft of the same category converge, but not head-on?

Unless otherwise specified, Federal Airways include that Class E airspace extending upward from

(Refer to figure 21, area 1.) What minimum radio equipment is required to land and take off at Norfolk International?

Two-way radio communication must be established with the Air Traffic Control facility having jurisdiction over the area prior to entering which class airspace?

The vertical limit of Class C airspace above the primary airport is normally