An aircraft is flying over the sea at FL 120, with a true altitude of 12000 feet

Question

ATPL - Airline Transport Pilot license - Meteorology - An aircraft is flying over the sea at FL 120, with a true altitude of 12000 feet

QuizVDS · Accepted Answer

Local QNH is 1013 hPa. What assumption, if any, can be made about the air mass in which the aircraft is flying ?

QuizVDS · Answer

Its average temperature is the same as ISA

QuizVDS · Answer

There is insufficient information to come to any conclusion

QuizVDS · Answer

It is warmer than ISA

ATPL: An aircraft is flying over the sea at FL 120, with a true altitude of 12000 feet