FSX – ISFD Gauge flight2000it 8 years ago FSX – ISFD Gauge. This is an ISFD “Integrated Standby Flight Display” gauge for FSX and possibly FS2004. 9 MB FSX – Integrated Standby Flight Display (ISFD) GaugeFSX/FS2004 – Davtron M377C Outside Air Temperature (OAT) GaugeFSX/FS2004 – Bendix King KR87A ADF Radio Revision 1