FTA-750/FTA-550 O perATing MAnuAl25Reception of VOR SignalsWhen the FTA-750/FTA-550 receive a VOR (VHFomnidirectional range) signal, the display will automati-cally switch to the NAV band screen which shows aCDI (course deviation indicator) based on the receivedsignal, and “VOR”, which indicates that the FTA-750/FTA-550 are receiving the VOR signal, appears on thedisplay.113.600VOLCOG T360°355°OBS000°NAV VORFROMKLAX-VORNSEW332421 15123036 Course indicator Deviation marks Course deviation needle OBS (omni bearing selector) value VOR value TO/FROM indicator COG (course over ground) value according to theGPS signal The OBS will be set to the direction (0 to 359 de-grees) included in the received VOR signal untilyou set a new one. When the internal GPS unit is not activated or can-not receive a fix even it is activated, the top of thecompass rose always indicates the direction set asthe OBS.When the internal GPS unit is activated and receivesa fix, the compass rose rotates to display the travel-ling direction always at the top. The COG is displayed only when the internal GPSunit is activated and receives a fix.Note:The internal GPS unit is inactive in the factory default.Activate it via the SETUP mode (see Page 54) if neces-sary.adVanced operatIon