EUROCONTROL has been monitoring the implementation of Aviation System Block Upgrades (ASBUs) on behalf of ICAO via its EUR/NAT Office since 2015. The 6th and latest edition of the ICAO ASBU Implementation Monitoring report, developed by EUROCONTROL on behalf of ICAO and endorsed by ICAO’s European Aviation System Planning Group (EASPG) earlier in December, provides a consolidated overview of the progress made by each of the 55 States in the ICAO EUR Region in implementing ASBU Block 0 Modules.