Eurocontrol’s Maastricht Upper Area Control Center last week introduced a system to dynamically manage upper airspace to suit traffic flow. The new variable division flight level (VDFL) enables a flexible distribution of traffic between upper and lower sectors (from 24,500 feet to unlimited), by altering the division flight level to match changing traffic patterns. The division flight level between the upper and lower sectors was previously fixed at 33,500 feet. Unique in Europe, the VDFL is considered a first step toward introducing dynamic sectorization into the Single European Sky ATM Research (Sesar) program.