Casio G-Shock (GW-9500) Mudman | Altimeter Calibration (restore to Casio default)

Casio G-Shock Master of G Mudman (GW-9500): How to set a reference altitude on the altimeter as well as how to delete the reference altitude so that the device is back to the Casio factory default.

[@enixie3674]

Wow man, thanks! That's works also on a GW-9400 Rangeman. But the main problem is I don't know if default measures are de facto true or not, 'cause my phone's sensor and online maps show ~370 meters while my watch is showing ~330. So I don't know where is the truth