An aircraft is flying over the sea at FL 100, with a true altitude of 10000 feet

Question

ATPL - Airline Transport Pilot license - Meteorology - An aircraft is flying over the sea at FL 100, with a true altitude of 10000 feet

QuizVDS · Accepted Answer

It is colder than ISA

QuizVDS · Answer

Local QNH is 1003 hPa. What assumption, if any, can be made about the air mass in which the aircraft is flying?

QuizVDS · Answer

Its average temperature is about ISA

QuizVDS · Answer

It is warmer than ISA

ATPL: An aircraft is flying over the sea at FL 100, with a true altitude of 10000 feet