ATPL: Refer to the Student Pilot Route Manual: E LO 2An appropriate flight level for flight on airway B3 from CHATILLON CTL 117.6 (49°08'N 003°35'E) to CAMBRAI CMB 112.6 (50°14'N 003°09'E) is:
Question 112, Flight Planning and Monitoring - ATPL - Airline Transport Pilot license