Question id 26 - Operational Procedures - ATPL - Airline Transport Pilot license

60 NM between aircraft meeting NAT HLA approval standards.
90 NM between all aircraft flying in the NAT region.
60 NM between all aircraft operating below NAT HLA (North Atlantic High Level Airspace).
90 NM between aircraft flying above FL285.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license