VOR Cone of Confusion

I recently got an email from a user of Nav Trainer asking what the red lines represent on the sides of the VOR station symbols.

Those red lines represent areas where the VOR signal is ambiguous and the VOR display is unreliable.

Continue Reading

Deciphering RNAV approach minimas

GPS and RNAV approach terminology can be very confusing since modern RNAV procedures usually accommodate more than one type of navigational equipment (such as basic GPS, WAAS, LAAS or multi-sensor FMS) on the same chart. With older types of approach procedures, the specific equipment required is stated in the chart title. For example, you could only fly a “VOR RWY XX” approach with VOR equipment, or an ILS approach with ILS equipment.

Continue Reading