The expanded Class B airspace is needed for airline traffic using the airport and to accommodate area navigation (RNAV) departure procedures. A third parallel runway also requires an expansion of the protected airspace, according to the FAA. The Aircraft Owners and Pilots Association has raised concerns over the airspace expansion, particularly in light of two airports that would fall under the Class B jurisdiction with the new dimensions. They include Chester Catawba Regional Airport, 25 nautical miles southwest of Charlotte/Douglas. Chester is an active skydiving facility and AOPA is concerned that the new airspace would impinge on operations there. Also, Lancaster County-McWhirter Field in Lancaster, North Carolina, is 25 nautical miles south of the international airport.