In uncontrolled airspace the responsibility for separa - tion from other aircraft is the responsibility of the pilot.  The PPC pilot must be aware that the pilot of the other  aircraft may not understand the requirements and/or  limitations of the PPC. In operations at uncontrolled  airports 14 CFR part 91 requires that PPCs avoid the  flow of fixed-wing aircraft. Regardless of the airspace,  see and avoid is a key ele - ment of flying in a PPC. The slow speed of the PPC al lows it to be overtaken by higher performance aircraft  quickly. Vigilance and proper  scanning techniques are  extremely important in all airspace, particularly when  operating around nontowered airports. Knowledge of airspace dimensions, requirements to  enter the airspace and geographical location of the  airspace is the responsibility of all pilots. The current  sectional chart is the primary official tool to determine  the airspace you are flying within or trying to avoid. Pilotage is navigation by reference to landmarks to  determine your location and the location of airspace.  Pilotage is the best form of navigation to ensure that  you avoid airspace you are not authorized to enter.  Locating your position on the sectional chart and  locating/identifying the airspace you want to enter/ avoid requires preflight planning on the ground and  situational awareness in the air. GPS is a very popular form of navigation use by pow - ered parachute pilots. The GPS receiver is small, sim- ple to use and inexpensive compared to other forms  of electronic (radio) navigation. Simple modes of  operation and the aviation database give the pilot a  considerable amount of information about the flight,  the terrain and Class B, C and D airspace, and spe- cial use airspace. Many pilots use GPS to determine  distance from airspace with restrictions and/or com- munications requirements. When using GPS to avoid  airspace, allow for a buffer between the aircraft and  the airspace. The aviation database in the GPS may  not exactly match the airspace as depicted on the sec - tional chart. If there is a difference between the sec tional chart and GPS information, the sectional chart  should be considered the correct information. A PPC pilot using GPS should ensure that the bat - teries are fresh and the aviation database is current.  Never rely entirely on the GPS for navigation. Always  back up GPS by using pilotage with a sectional chart  and checkpoints when flying beyond visual range of  a familiar airport. In addition, the GPS should be se - cured in the powered parachute so it does not depart  the cart, nor touch the propeller before it stops. Navigating the Airspace 8-7