Eurocontrol Routine Observation Safety Survey (EUROSS) is a on-going method that records the everyday operation actions (behaviours of controllers) that contribute to the performance of operational system. The objective of EUROSS is to measure the frequency of previously identified best practices. The campaign has been set up jointly by ATCOs and management to look for best practices and subsequently proactively improve safety by reinforcing them, exposing hidden safety issues and avoiding undesired incidents. The following results have been compiled from 154 observations conducted from January through August.