When I fly a VOR approach I notice an option "VOR arm" on NavRadio ( LSK2L ) after Ienter the VOR frequency on LSK1L.What is the purpose of this "VOR arm" and what does it do ? And what happens if leftout ?I went through the manuals without finding an appropiate answer.Can anybody explain.Thank youAntonio Vernas

When you setup your NAV radios with the course to be flown for a VOR intercept, press the VOR ARM button and the aircraft will intercept whatever course it is you have programmed.

Antonio,Works similar to the VOR/LOC in a Boeing aircraft. Arm it, fly heading to intercept, The aircraft will track VOR.JW

It is talked about in the Systems manual, page AUTO.10.24

It is talked about in the Systems manual, page AUTO.10.24

It seems I have no Auto.10.24 in the Systems manual.By AUTO I assume you mean Autoflight.Antonio

PMDG MD-11 Systems.pdf: Aircraft systems - Automatic-flight - FMS-coupled operations - page 24 - FMS VOR Approach Modeor page 118 of 534.