National Airspace System

Refer to Appendix 1, Legend 1. On Figure 23, area 3, the group obstruction near the 009 degree radial has the word "stacks" below 454. The bold number (454) indicates the height of the obstruction above mean sea level.

Refer to Legend 1. Tomlinson Airport is in the top left corner of Figure 26, and lies outside any colored circles. This indicates the airport is within Class E airspace from 1,200 feet AGL up to but not including 18,000 feet MSL.

The wire-rich environment is typically below 1,000 feet. Not all wires are marked and they can be nearly invisible when viewed from different angles. Remote pilots must exercise vigilance when operating near helicopters, moored balloons and other places where wires are frequently present.

The Chart Supplements U.S. is a publication for pilots containing information about airports, seaplane bases, and heliports open to the public including communications data, navigational facilities, and certain special notices and procedures.Answer (B) is incorrect because these publications do not have comprehensive and specific airport information. Answer (C) is incorrect because these publications do not have comprehensive and specific airport information.

Refer to Appendix 1, Legend 1. The routes established between VORs are depicted by blue-tinted bands showing the airway number following the letter "V," and are called "Victor airways." Remote pilots should exercise vigilance in looking for other aircraft when operating near these high density areas.

Tabulations of parachute jump areas in the U.S. are contained in the Chart Supplements U.S.