Makers fault for not having enough already on hand to quickly send out spares if people requested them. Count on us for all your navigation chart requirements!Ģ were left on backorder, but not you alls fault. Your credit card will be billed when we ship you each new chart. You will then recieve the new editions of each chart automatically when they are issued indefinitely until you cancel the subscription. Once in the cart, you will be asked if you would like the current chart now, or start with the next revision. To order a subscription, put a quantity of 1 in the Subscribe column for each chart you would like the subscription for, then click the "Add to Cart" button at the bottom of the table.
Take the hassle out of remembering to re-order new navigation charts at every revision by signing up for chart revision service with us. 60 x 20 inches folded to 5 x 10 inches.) Revised semi-annually, except most Alaskan charts are revised annually. The aeronautical information on Sectional Charts includes visual and radio aids to navigation, airports, controlled airspace, restricted areas, obstructions, and related data. The checkpoints include populated places, drainage patterns, roads, railroads, and other distinctive landmarks. The topographic information featured consists of the relief and a judicious selection of visual checkpoints used for flight under visual flight rules. It can be used in an emergency for IFR flight, but it is strictly designed for aircraft flying VFR.FAA NOS Sectional aeronautical charts are designed for visual navigation of slow to medium speed aircraft. Towers, wires, and other man-made structures are difficult to see from the air. If you are flying below MEF, make sure that you know where all the obstacles are. The MEF is great tool to ensure you clear obstacles. These cases are very rare and occur only where there is a very steep elevation change. So if that specific interval is 300ft, add 150ft instead of 100ft. In areas where the contour interval for that specific quadrant is greater than 200ft, half of the contour interval is added instead of 100ft. The 200ft addition for natural obstacles provides extra clearance due to vegetation growth as trees get taller, buildings or towers that may have been constructed, or other items. The 100 ft addition to both altitudes is to make sure there is proper obstacle clearance when there has been an error in measurement, a slight deviation from plans, or for any other reason that the obstacle may be a little taller than originally measured. When a natural obstacle is the highest obstacle in a quadrant the FAA uses a different formula for extra safety:Īgain, round the result up to the next 100ft and you have the MEF. Round up to the next highest 100 feet and you have the MEF. When a man-made obstacle is the highest obstacle within a quadrant, the FAA uses the following formula to calculate the MEF: Each method ensures the highest level of safety and that as long as you stay above MEF you will be clear of all obstacles. MEF’s are calculated two ways, one for natural obstacles, and one for man-made obstacles. The MEF depicts the lowest altitude you can fly and still be assured to clear every obstacle within that quadrant. One of the most important numbers on a sectional is the Maximum Elevation Figure, or MEF.
0 kommentar(er)
