Thanks Alex,
I was pondering over that one in the exam for ages, I was thinking about it from every angle, does Rho stand for something, like Range, Heading, but couldn't think of anything for O. I went for DME DME in the end because it was deemed to be the most accurate for RNAV. The other options were non starters, something like VDF and NDB
- it might be worth adding to your questionbank as I checked both V1 and V2and couldn't find it in your fine tool, I couldn't find the first question I posed either.