It is impossible to navigate without a chart.
In the first days of air transportation, airways only connected major cities. In the daytime pilots navigated along these airways with dead reckoning and after dark followed a series of flashing beacons spaced about ten miles apart.
The first aviation charts were strip charts, and displayed an 80-mile wide corridor about these established airways. Adequate if one remained on the airways, pilots reached for a road map if they had to deviate from their course because of storms, or needed to fly to a destination not on a primary route. Or if they got lost.
In 1930, area charts were developed to provide coverage for the entire United States. These charts divided the now lower 48 states into 87 sections. They have since been reprinted on two-sides and now 37 sectional charts cover the same area.
The Sectional ChartThe Sectional Chart is for VFR flight only. Canadians have their VNC, the VFR Navigation Chart.
Each Sectional Aeronautical Chart carries the name of a principal city within its coverage area. Hence the New York Sectional, or the Miami Sectional, or the Chicago Sectional, etc.
Here are the available U.S. sectionals for the "lower 48" and their coverage area. Note that the New York sectional coverage area is grayed out. Each chart grays-out its own coverage area so that the user can quickly identify that coverage area.
Coverage chart of available sectionals taken from New York Sectional. Click image for larger view.
Flight-simmers would do well to purchase a sectional chart for the area where they live or an area where they want to "fly." Also buy a Terminal Area Chart if you live near one of those large cities. Both are available at your local airport, or through the Internet (enter "pilot supplies" into your search engine.) Spend some time learning what's on them. It will help you better understand navigation and if you're a flight-sim enthusiast, you'll find them fascinating.
Before delving inside a sectional to begin your flight planning note two things on the chart's front panel: the date of issue and the highest terrain figure.
Sectionals expire six months after their date of issue. Sometimes the changes are small, others are significant like a change in VOR or control tower frequencies. Perhaps a 1000 ft. TV tower was erected near the approach path to your destination airport. Charts are inexpensive, keep them current. The scheduled issue date of the next edition is printed on the front panel of the sectional.
The highest terrain point on a sectional is noted on the front panel of the chart, too, along with its location. Miami sectional's 305 feet is not much of a factor, but you may want to ponder the 6288 feet for the New York sectional.
Sectionals contain a wealth of information. Far too much to fully describe here. The correct time to study a chart in depth is during flight planning, not after the aircraft is in the air. Accident reports indicate that this common-sense rule has not always been followed.
Remember, sectionals are for VFR flight only and so they feature landmarks that are visible from the air: railroads, lakes and rivers, especially prominent buildings, cities, power lines, and towers and other obstructions.
Ground elevations are shown, with the color code for different terrain levels depicted on the front panel.
Naturally, all airports appear on the sectionals. Their symbol color is red if an uncontrolled field (no control tower) or blue if a controlled field. The airport symbols show the runway layouts, too.
The sectionals present an amazing amount of airport information, including the availability of ATIS.
ATIS, Automatic Terminal Information Service, is a recorded announcement broadcast 24 hours a day. This announcement gives the current weather and surface winds, the altimeter setting, active runway in use, frequencies for initial contact with the airport and other advisories, such as if a runway is closed—or the airport is closed! The broadcast information is updated hourly, unless local conditions warrant more frequent updates. Each update is given a letter, and the voice announcement might end with "inform approach control that you have Information Delta."
A portion of the pilot's initial contact with approach control could be "Nantucket, this is Barn-Burner 3343-Alpha (type aircraft and registration number), with Delta."
Normally, that would end the reference to ATIS. On occasion, though, approach control might respond, "Roger 3343-Alpha, radar contact ... Echo is current," lightly slapping the pilot on the wrist for last tuning in ATIS too long prior to initial contact.
Oddly, though, I've never heard approach control utter those words of remonstration when Air Force One initially reports in.
The sectional shows the established airways, called Victor airways, as well as all nav-aids.
Below is an excerpt from the New York sectional centered about the Nantucket, Massachusetts airport. The paragraphs following the image describe many of the features on the chart. I recommend that you click on the image below to print the sectional excerpt (its not color), a pdf file, to use while following the descriptions. If you don't have Adobe's Acrobat Reader, a free program needed to read pdf files.
An excerpt of the New York Sectional near the Nantucket, Massachusetts Airport. Click image to download and print the pdf file, then continue below.
Notice the dashed blue circle surrounding the airport symbol. This circle defines the Class D airspace. All aircraft in Nantucket's Class D airspace, which is the surface to 2500 ft. MSL (learned from the "25" in the dashed box), are required to be in radio contact with the tower.
The white "R" in the blue circle before the airport name, Nantucket Memorial, denotes that radar is available.
CT – 118.3 identifies the Control Tower frequency as 118.3 MHz.
ATIS 127.5 is next, which signifies that Automatic Terminal Information Service is available on the field, and at Nantucket it broadcasts on 127.5 MHz.
A number-chain near each airport symbol designates the field elevation, whether runway lighting is available and the length in hundreds of feet of the longest runway.
Nantucket's number chain is 48*L63. The field elevation is 48 feet, it has lighted runways, and the longest runway is 6300 feet. The "star" before the "L" means "some lighting limitations exist—refer to the airport/facility directory." Yep, that's another publication a pilot must buy and keep current—see later for more info.
VORs and NDBs are both shown on a sectional chart. The large compass rose with an arrow pointing towards magnetic north identifies a VOR. A red circle filled with dots portrays an NDB. In this case, both the VOR and the NDB are appropriately named Nantucket.
The navigation box near the top shows Nantucket's VOR frequency is 116.2 MHz. Its identifier is ACK. The Morse code for ACK also appears in this box.
CH 109 is channel 109. Sometime one or two centuries ago, a higher power decided that aviators couldn't handle such complexity as 116.2 MHz. So channel numbers were assigned to the frequencies, thus CH 109 is 116.2 MHz. Surely there is some sort of prize available for the first person to find an aircraft with a Nav receiver that requires channel number settings. If I'm way out in left field on this one, please e-mail me and set me straight. Meanwhile, channel numbers continue to clutter up VOR navigation boxes on charts.
The navigation box to the left, half-way down, identifies the NDB. Its frequency is 194 kHz and the three-letter identifier is TUK. Again the Morse-code is shown. The underline on the frequency means that no voice transmissions are available.
All Victor Airways are marked on sectionals. These are airways defined by VORs, hence the beginning letter of V. Aviation communication extensively uses the phonetic code, so airway V 146 on the 300° radial of the "ACK" VOR would be identified as Victor 146.
The "boxed" 27 above the letters V 146 indicates 27 nautical miles from the "ACK" VOR to the next VOR on the airway.
The bold "06" in the lower left of the illustration is the Maximum Elevation Figure for that grid-square. The large digit(s) on the left, here a zero, is the thousands of feet above MSL and the digit on the right is the hundreds of feet above MSL. For this grid the highest elevation of anything, terrain, obstructions, towers, antennas, etc., is 600 feet MSL. Every grid square on a sectional chart has such a notation.
The inverted "Vs" near the airport symbol are obstructions, usually towers. Two numbers are printed next to these obstructions: its height above sea level, and its actual height in parenthesis. You will note a popular obstruction location is near airports.
Don't bother trying to memorize all these symbols and notations. The ones that you frequently use you will learn quickly enough. You can look the others up on the legend panels of the sectional chart.
Each sectional also shows and lists areas of restricted flight. For example, flight is prohibited over the U.S. Capitol or the White House or the Washington Monument. Surface-to-Air Missiles probably don't await you if you violate that airspace, though. It's the bevy of fast-approaching F-16's flown by pilots who, for the moment, have lost their sense of humor that should cause concern. German pilot Matthias Rust ruined it all in 1987 when he flew his Cessna 172 from Germany to Moscow and landed on the grounds of the Kremlin, undetected by the vaunted Soviet air defense.
The next illustration shows prohibited area P-67, here a circle with inward radial lines.
P-67 normally prohibits flight from the surface up to 1000 ft. AGL, unless a certain very important visitor is present.
Next is a Restricted area, R-4105, also enclosed with blue hatched lines.
R-4105 protects a national wildlife refuge. This coverage area extends from the surface up to, but not including 18,000 ft.
Pilots should also be aware of any Warning Areas in their path of flight. These are identified in the same manner as a prohibited area or a restricted area, with a blue border with hatched lines extending inward.
The notation for Warning Area W-104B should be enough to keep you out:
Warning, National Defense Operating Area. Operations hazardous to the flight of aircraft conducted within this area.The sectional-chart scale is 1:500,000. That means lay a one-foot ruler on the chart and you will have to pace off 500,000 feet of real ground—almost 95 statute miles—to cover the same distance.
It's only important to know this number because the scale of a Terminal area chart is1:250,000, and the scale of a World Aeronautical Chart is 1:1,000,000. When flight planning, use the proper scale on your plotter when measuring distances. Oh yes, and the sectional-chart scale question has been on the private-pilot written exam for decades.
Terminal Area ChartsTerminal area charts support Sectionals in the same manner that city street maps support state road maps. The Terminal chart is an expanded view of the terrain and aeronautical features in the vicinity of a major city.
Terminal Area Charts usually carry the same name as the sectional. Sometimes a terminal area chart is available for a second city within a sectional chart, such as the Boston Terminal Area Chart in the New York sectional. Terminal area charts are valid for 196 days (someone must have won the lottery on that number).
As already mentioned, a Terminal Area Chart's features are identical with a sectional chart except that they are one-half the scale to show details more clearly.
World Aeronautical ChartsWorld Aeronautical Charts—WACs—as the name implies, are available for coverage areas extending beyond the U.S. and Canada. You can get them for the U.S. and Canada, too. Again, buy them at your local airport or through the Internet.
World Aeronautical Chart coverage for the United States.
WAC features are identical to sectionals, with two exceptions. The scale is one half, already mentioned, and the validity period differs. World Aeronautical Charts are valid for one year. The date the next edition is scheduled is printed on the front panel.
Airport – Facilities DirectoryThe Airport – Facility Directory is a comprehensive descriptive listing of every airport, heliport, and seaplane base in the U.S. that is open to the public. It is published every 56 days by the National Ocean Service (NOS). There is so much information in these documents that seven regional volumes are required to cover the lower 48 states. It's indexed by state then city.
The illustration below is part of the header in the Directory for the Nantucket, Mass. Memorial Airport. Everything you ever wanted to know about an airport is contained in this publication: airport sketches, Navaids, communications data, weather data sources, airspace, special notices, and operational procedures. It includes data that cannot be readily depicted in graphic form: e.g., airport hours of operation, types of fuel available, runway data, lighting codes, etc.
It also provides a means for pilots to update visual navigation charts between editions dates; i.e., the Airport/Facility Directory is published every 56 days while the VFR Sectional and Terminal Area Charts are generally revised each six months. This is an inexpensive publication, like charts, and is worth purchasing.
This is a portion of the Nantucket Memorial header in the Airport Directory.
The second line: the airport elevation is 48 ft. above MSL, B means a rotating beacon is present, S4 is the level of aircraft maintenance available (nice to know in case the rubber bands break under the cowling), 100 Low Lead gasoline available, Jet A kerosene fuel available, and ARFF index A indicates the level of fire-fighting and rescue equipment that is available.
Then follows nearly a full page of additional information
An unofficial version of the airport/facilities directory is available online. I'm not certain if it's suitable for "real" navigation, but it's great for flight-simmers.
IFR charts are the next topic. Use the IFR Enroute Low Altitude Chart for IFR flight below 18,000 feet (same title in Canada) and the high altitude enroute chart above that. Click on the IFR Charts button below to move on.
Although I did the keyboarding for this site it contains the fine contributions of many people.
With no prior experience in building a website I was overwhelmed at the generosity of those that I asked for permission to either reproduce their work, or for their technical help, or to use their designs, artwork and descriptions.
Many thanks to those listed below in alphabetical order, who so willingly shared their talent so that I could assemble these webpages:
Bob Austin, of Mission Viejo, California. A scenerio in the VOR Approaches section required an over-kill list of mountaineering equipment for Mr. Benjamin Counter. Counter intends to "scale" southwest New Hampshire's 3165 ft. Mt. Monadnock, the second-most climbed mountain in the world, behind only Mt. Fuji in Japan. Since Florida's highest "mountain" just reaches 345 ft. I had to look elsewhere for an expert. Bob Austin jumped right in, providing an awesome equipment list, which I had to shorten. Any omissions are my work, not his. Bob has the credentials to provide an accurate and complete list, too. In his climbing he's completed six big-walls including two El Capitan routes—The Nose and Triple Direct. Thanks, Bob. Just reading your equipment list I could imagine the wind fiercely blowing off the face of the mountain, daring any climber to move higher.
Wagner Beskow, for his Handy Sheet 3.0. Wagner, a Brazilian in New Zealand taking his Ph.D., assembled this one-page compendium of useful facts for the flight-simmer. "It takes a while for a beginner to find all that information and when he does it's all scattered and difficult to refer to. The idea was to produce something useful that could stay around without cluttering the 'cockpit' too much." Thanks, Wagner. I wish I could say my cockpit was uncluttered now.
Boeing Company, photo of 40-A mailplane. The 40-A, a fabric-covered mail plane, was Boeing's first commercial success. Built in 1927 (the year Charles Lindbergh crossed the Atlantic), it carried mailbags and—load permitting—two passengers. http://www.boeing.com/companyoffices/gallery/boeinghistcom.html
Tom Christine, Electrical Engineer, Federal Aviation Administration. Tom was very helpful on specifics about present-day Non Directional Beacons, including their power levels, uses, their friendly coexistence with GPS, and frequency limits of the LF band. Thanks Tom.
Mario Corral, Sydney, Australia, who sent me the sketch of the homing pigeon. Mario patiently explained to me some similarities and differences between homing pigeons, racing pigeons, and carrier pigeons. Thanks Mario for keeping me on the right track.
Rick Covington, photos of the Piedmont DC-3 in the "On the Beam" section. Thanks Rick ... an excellent photo. You can find more of his photographic expertise at www.airliners.net. He photographed the Piedmont shown here in Durham, N.C.
Mike Genovese for the finest interior shot I've seen of any aircraft. "The shot was taken in Nassau in the early 90's... the plane was just sitting there unattended as we (crew of a major airline) walked by on the ramp... I could not resist the opportunity for the 'Kodak Moment!' ... " Great pic Mike and keep your camera handy as you jet to all those tough destinations. See www.airliners.net for more of Mike's work.
Jesse Kempa for his virtual E6-B calculator program. This program does it all, and best of all, it's freeware. Input True Course, TAS, wind speed and direction and on the click of a button it returns the Wind Correction Angle and Ground Speed. It will calculate distances between points with known lat. and long. coordinates, and on and on. Thanks Jesse for a great utility.internet.oit.edu/~kempaj/e6b.htm
Brian Kostick, the gauge programmer of the very-useful digital Elevator Trim indicator. With it the pilot has repeatability in elevator trim settings. Thanks to Brian, Br5an@aol.com, for an instrument that I rely on and for his quick willingness to let me use it in this panel.
Paul Lutus ... who wrote the freeware HTML editor "Arachnophilia" which I used in assembling these webpages. Arachnophilia is a full-featured, nearly perfect editor—and now v4.0 is even better with a 120,000 word spell-checker. Paul has an outstanding philosophy on life, too. Thanks, although we've never "met." www.arachnoid.com
Alice Marks ... for the extraordinary sketch of McGirr field. That picture is the essence of the intermediate fields that Air Mail pilots aimed for when facing an emergency. Her artistry instantly backed me onto McGirr field—into the new era of Air Mail, with the wind sweeping across the plains, striking me in the face. But then, it should have because Alice Marks's father was McGirr field's caretaker and Alice grew up there. She has a wonderful first-person account of the activities at the field that beats anything you'll read in stuffy history books. Take five and go to her site and relive the experience. http://www.halcyon.com/cliffsan/airmail/air_mail.html. Thanks Alice, twice ... for sketching McGirr field to keep that kernel of history alive and for letting me share it with others.
Ned Preston, Agency Historian, Federal Aviation Administration. Ned provided the chronology on when VORs were introduced, a whole wealth of information on the four-course radio range and on the light-beacon system used to identify the airways at night before radio navigation facilities were in place. Never met a more helpful person. Thanks Ned.
Bill Rambow for his many e-mails answering so many questions. Bill designed the incomparable dual panel for the Douglas DC-3 / R4D / C-47. A restored, flyable U.S. Navy R4D at the Mid Atlantic Air Museum in Reading, Pa. was the model for his work. A finer piece of work I've never seen. Thanks for the encouragement, Bill.
Tom H., "Rumple," a gentleman who always sets his work aside to answer the other fellow's questions. I reaped the benefits of his very-methodical air-file testing. He also designed the manifold pressure gauge for the training panel in my Virtual Airline. Tom is very visible on newsgroups and forums patiently answering questions that are asked over and over. Thanks for being there, Tom.
Sarah at Airline History Website for the photo of the KLM Douglas DC-5 which opens the VOR Navigation section. I only recently learned that a DC-5 had ever existed and wanted to include a picture of it. Since Sarah's site has 350 Airline Histories, 1700 Airline Pictures, and 150 Airliners from 1920 to 1999, I knew it would be there. Why is Sarah interested in all this stuff? ... because she's a pilot—and more. She writes software for and sells IFR flight Simulator programs for real IFR training. Thanks Sarah for the great work that you put into your site.airlines.freeuk.com/airlines
Chris Sheldon, firstname.lastname@example.org, from the U.K. He photographed G-AMPZ at Manchester Airport, and it appears here in the IFR Charts section. The aircraft belongs to Atlantic Airways (previously called Air Atlantique) who are based at Coventry Airport. The first letter in the registration number, "G," denotes a U.K. aircraft. Chris exhibits his work at www.airliners.net. Thanks Chris.
Russ Strine, Mid Atlantic Air Museum in Reading, Pa. Here's another fountain of information. A very busy man at the museum, he pushed his papers aside and spoke with me for an hour on the telephone about aviation in the old days and VORs and NDBs and answered questions that I just wasn't savvy enough to ask. He gave me some anecdotal stuff, too, that you can't find in books. Thanks for your time, Russ, and all the information. www.maam.org
Barry Thomas, Silversmith, who created the magnificent chalice pictured in the section on tracking ADF's inbound. That section's lead-in story centers around Mr. Benjamin Counter's desire to fly to Meriden, Connecticut, 'The Silver Capital of the World' to buy some silverwork. The chalice pictured was not created in Meriden, nor even in the U.S. Barry Thomas is a silversmith in rural Derbyshire, England. Meriden earned the Silver-Capital title in the late 19th century and it is doubtful that it still retains the rights to that sobriquet. Thanks Barry for the great picture, too. More of his masterpieces can be found athttp://easyweb.easynet.co.uk/bthomas.
Rod Watson, for his stunning photograph of the Gay Head Lighthouse on Martha's Vineyard, Massachusetts. Rod has visited over 170 lighthouses in the US. and the Lighthouse Gallery section of his website, Rod's Photo Gallery, includes photographs of most of those lights, organized by geographic locations. He photographs more than lighthouses, too. Thanks, Rod, for a great picture.Rod's Photo Gallery
Roland Zuiderveld, from Sweden, for his totally awesome picture of a DC-3 descending out of the clouds at dusk to land. Roland also displays his work onwww.airliners.net. Thanks Roland, and if you take any more pictures like this one I want to hear about them.
Many others contributed to my virtual airline webpages and were just as generous. They are identified on that site. Assembling a webpage is so much easier with the assistance of people like these.