FSX – Auto Altimeter Gauge flight2000it 7 years ago FSX – Auto Altimeter Gauge. This gauge automatically maintains and calibrates your altimeter with local pressure below 18000ft and standard pressure above 18000ft. By Steve Colley 5 Kb FSX – Auto Altimeter GaugeFSX – Modified Gauges For Default Cessna 208BFSX/FS2004 – Sizeable And Draggable Gauge