Originally Posted by Brake Rider
30 miles would suffice for me, I will make the assumption you're using a GPS to get that distance.
Agree! It doesn't matter where it comes from; if it's possibly not accurate (3 thumb widths+hair), then say "approximately".
Originally Posted by Lead Balloon
That results in substantially different decisions in my cockpit than if the report was merely
?? Give us an example of where the distances could be so different at a location that would result in a "substantially different decision".
Unless it is a report to ATC IAW ENR 1.1 21.3.3, keep the R/T verbal-diarrhoea-free and use "miles".