NATO also shifts to the ACR-PCR system
The North Atlantic Treaty Organisation (NATO) decided to define their military requirements for airfield pavement strength in terms of the Aircraft Classification Rating (ACR), following the ICAO international system of load bearing strength reporting. Currently, NATO is in the transition from the ACN-PCN system to the ACR-PCR system. NATO wishes to determine in a reasonably short time a single methodology for establishing PCR values. The methodology is subject to discussion within the NATO Airfield Services Working Group (ASWG). NATO nations oppose the underlying design ICAO methodology for determining ACR, as suitable for extension for the determination of PCR.