This “Compromised Separation Theory” AirBook examines how aircraft may end up in a compromised separation situation and how a controller can resolve these situations. This is supported by video scenarios of these issues occurring and possible approaches for how to deal with them.

• Define aloss of separation
• List contributing factors
• Recognise how to respond to STCA
• Describe actions required for TA and RA
• Describe the immediate actions required for a loss of separation
• Discuss the importance and content of ‘Essential Traffic’
• Discuss appropriate techniques to respond to loss of separation