Altimeter reports wrong altitude

[Supernova-III]

Senaki-Kolkhi, 998.5 hPa. Altimeter reports:

[BJ55]

QNH or QFE?

There's a pressure units conversion aproximation error and a QFE calculation error in DCS, but the MB339 altimeter precision is within specifications.

But there's a bug: the altimeter get stuck with negative values past -250.

Edited August 9 by BJ55