Join Date: May 2001
Location: Portland, OR, USA
Programs: UA 1K 3 Million/ex-many year GS, AA PLT/2 Mil, AS MVPG, HH Dia, Starwood Life Plat, Hertz PC
Posts: 1,401
Not a perq - a certification requirement for those seats. As I recall it has to do with the distance between the seat and the next thing in front of you and how all that affects a body in a rapid decelleration situation.