The maps depict the maximum altitude above ground level at which a drone may be flown safely for each location in controlled airspace. Of course, as you should recall, lacking that magenta vignette, the 700-foot limit becomes 1200 feet. Class G - Uncontrolled Most Class G airspace is that space from the surface up to 1200 feet. It seems to start at random altitudes all over the map, but there's logic to it. The FAA has upgraded its LAANC (Low Altitude Authorization and Notification Capability) system to allow recreational flyers to request automated airspace authorizations to fly in controlled airspace. It is the most complex airspace for weather minimums as it not only has 3 altitudes it also has day/night minimums. There are two primary types of airspace - Controlled and Uncontrolled Types of Controlled Airspace Class A Class B Class C Class D Class E Class A Airspace is primarily for high-altitude enroute traffic. Simply put, stay away from all aircraft! 2. Except while in a holding pattern of 2 minutes or less or while turning, each person operating an aircraft under IFR in level cruising flight in uncontrolled airspace shall maintain an appropriate altitude as follows: (1) When operating below 18,000 feet MSL and - Airspace is a three-dimensional area described in terms of altitude as well as by other characteristics such as whether it is above an urban or remote area. This airspace is where most drones fly. Airspace exists to protect something, whether that be certain aircraft at busy airports, or military operations areas. However all aircraft are required at all times to conduct their activities with regard to the CAA Regulations. The altitude cap can be anywhere from 400ft to 1200ft depending upon the surface level. The reason the Class E airspace extends nearer to the ground is to provide a controlled airspace transition area for aircraft operating IFR and making an IFR approach. Unless designated at a lower altitude, Class E airspace begins at 14,500 feet above MSL over the United States up to but not including 18,000 feet above MSL. Class E Enroute Airspace. This is truly uncontrolled airspace. Operations take place daily in uncontrolled airspace. Where the airspace classification and flight rules require, an aircraft must not enter controlled airspace without a clearance (see page 3.78 for holding procedures). Cloud clearance requirements: maintain altitude 500 feet below, 1,000 feet above, 2,000 feet horizontal. • Class E airspace may extend upward from either the surface or a designated altitude to the overlying or adjacent controlled airspace. Our air traffic controllers are responsible for keeping our skies safe. In most cases, this base is either at 700 or 1,200 feet above ground level. Pilots must be fit to operate – don’t fly your drone if you’re tired or under the influence of alcohol or drugs. The maximum altitude of uncontrolled airspace is determined by the base of the overlying Class E airspace. It is, therefore, vital for the IFR pilot to maintain a high standard of navigation and Airspace within a FIR (and UIR) is usually divided into pieces that vary in function, size and classification. When you understand that, the minimums (and the corresponding altitudes) make sense. Within uncontrolled airspace in Iran, aircraft may operate free of the control of an ATC unit. Visual flight rules. Airports with a magenta fringe over it on sectional charts have Class G airspace from the surface to 700 ft AGL where it meets the floor of the overlying Class E airspace, which extends to 17,999 MSL. Re: Traffic Pattern Altitude: 1000' vs. 800' Post by DJTorrente » Sun Jan 09, 2011 6:02 pm Not your area, but the Linden NJ (KLDJ) pattern is 800 ft. to squeeze it under the approach airspace for Newark Liberty Int'l (KEWR). Controlled vs. Uncontrolled Airspace. 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