January 2005
The National Park Service (NPS) is raising awareness of soundscapes, the sounds of nature that provide the backdrop for those beautiful panoramas and the solitude enjoyed by thousands every day.
Pilots are familiar with the ongoing controversy surrounding National Park overflights, most notably, in the Grand Canyon area. The chief complaint fueling the overflight debate is soundscape disturbance. Most legislation, both in place and proposed, primarily affects commercial tour operations. However, General Aviation pilots are requested to make some small allowances in an effort to protect these special places and our privilege to fly over them.
AIM 7-4-6, “Flights Over Charted U.S. Wildlife Refuges, Parks, and Forest Service Areas” reads, in part:
Pilots are requested to maintain a minimum altitude of 2,000 feet above the surface of the following: National Parks, Monuments, Seashores, Lakeshores, Recreation Areas and Scenic Riverways administered by the National Park Service, National Wildlife Refuges, Big Game Refuges, Game Ranges and Wildlife Ranges administered by the U.S. Fish and Wildlife Service, and Wilderness and Primitive areas administered by the U.S. Forest Service.
FAA Advisory Circular AC91-36 defines the surface of a National Park area as: the highest terrain within 2,000 feet laterally of the route of flight, or the upper-most rim of a canyon or valley. Simply stated, find the highest ground on your flight path and add 2,000 feet to your cruising altitude.
To the flatlander pilot accustomed to single-digit visibility, the FAA’s 2,000-foot request sounds indeed restrictive. However, given the wide open spaces and 100-mile vistas of the western National Parks, one quickly realizes the spectacular views are not compromised by a couple thousand feet AGL. Most of us consider 2,000 feet a short runway. This same distance, measured vertically, hardly seems limiting.
Some might think you can’t coax a Skyhawk or Cherokee high enough to overfly some Parks and stay in the good graces of the Park Service and the FAA. Untrue! My company, Parkwest Air Tours, organizes group flying tours which include scenic and legal flights over the Grand Canyon, Bryce Canyon, Yosemite and even Glacier National Parks.
The key is to study your charts, making sure to clearly discern Park boundaries and terrain. Take time to refresh yourself on mountain flying techniques and revisit your aircraft performance charts for high density altitude environments, if appropriate. As an extra measure of security, plot some waypoints defining safe and conscientious routes to follow using your GPS.
According to a NPS newsletter, most park managers judge aircraft as the greatest interference with soundscape enjoyment. Certainly there are many culprits of soundscape disturbance—thumping car stereos, whining snowmobiles and chortling tour buses to name a few.
One thing is sure in this endless debate: the parks are indeed special, so it is incumbent upon each of us to minimize noise in and above the National Parks. So let’s do each other a favor and respect the “request” while it’s still merely a request.
Marisa Fay, together with her husband Collin, have operated Parkwest Air Tours since 1999. The tours allow pilots the freedom of experiencing new destinations and flight environments with the safety and camaraderie of a group air safari. Whether it’s flying into Mexico for the first time or a desire to get the cockpit view of the Grand Canyon, Parkwest offers several alternatives to safely and scenically enjoy the National Parks. For more information about “Flying Quietly” or to participate in a self-fly National Park tour, contact Marisa Fay at mlfay@parkwestair.com, or visit parkwestair.com. For information regarding aviation matters within the National Parks, contact Cliff Chetwin, Regional Aviation Manager, at (303) 969-2657, or by e-mail at cliff_chetwin@nps.gov.
