Which of the following is an acronym for Visual Flight Rules Military Training Routes?

The acronym for Visual Flight Rules Military Training Routes is VR. Military Training Routes (MTRs) are established for the use of military aircraft that are flying in accordance with Visual Flight Rules (VFR). These routes help ensure safety and efficiency during training operations.

The other acronyms refer to different concepts: VFR stands for Visual Flight Rules, which is a set of regulations under which a pilot operates an aircraft in weather conditions generally clear enough to allow the pilot to see where the aircraft is going. VOR stands for VHF Omnidirectional Range, which is a type of radio navigation system for aircraft. VLOS stands for Visual Line of Sight, referring to the requirement for remote pilots to maintain visual contact with their unmanned aircraft. Thus, VR is specifically designated for military training routes under visual flight regulations, highlighting its significance in this context.