During a flight over the sea at FL 100 from Marseille (QNH 1016 hPa) to Palma de Mallorca (QNH 1016 hPa), the true altitude is constantly decreasing. What is the probable reason for this ?

Question

ATPL - Airline Transport Pilot license - Meteorology - During a flight over the sea at FL 100 from Marseille (QNH 1016 hPa) to Palma de Mallorca (QNH 1016 hPa), the true altitude is constantly decreasing. What is the probable reason for this ?

QuizVDS · Accepted Answer

The air at Marseille is warmer than that at Palma de Mallorca

QuizVDS · Answer

The altimeter is faulty

QuizVDS · Answer

One of the QNH values must be wrong

QuizVDS · Answer

The air at Palma de Mallorca is warmer than that at Marseille

ATPL: During a flight over the sea at FL 100 from Marseille (QNH 1016 hPa) to Palma de Mallorca (QNH 1016 hPa), the true altitude is constantly decreasing. What is the probable reason for this ?

Domanda 41, Meteorology - ATPL - Airline Transport Pilot license