What will your altimeter indicate after landing if it was not reset during descent?

After landing, if the altimeter was not reset during descent, it will indicate a height relative to the reference setting it had before the landing approach. Typically, this reference is the altimeter setting at the departure airport, which may not correspond to the air pressure at the destination airport.

If the altimeter setting was not adjusted, the altimeter could read a value that is influenced by either lower or higher atmospheric pressure at the destination. This would often result in the indicated altitude being either above or below the actual mean sea level (MSL) altitude. Specifically, when the altimeter is set to a higher pressure than the actual pressure at the destination, it will show a value that is lower than the true altitude, reflecting that the aircraft is actually lower than what the altimeter indicates.

The indication of "206 ft below MSL" signifies that, when landing, the true position of the aircraft is at a lower altitude than what the uncorrected altimeter is reporting. Therefore, the altimeter shows a negative altitude in relation to MSL because it has not been reset to the current local altimeter setting appropriate for the airport of arrival. This is a critical aspect of altitude reading during IFR operations, where maintaining accurate altitude information is