Originally Posted by
yarpos
Sounds more like freeway instruction on a GPS.
It is a valid phraseology. However it should be used for directing VFR traffic not IFR , it also can ( and is ) be used for calling out conflicting traffic.
To provide a direction or suggested headings to VFR aircraft as a method for radar identification or as an advisory aid to navigation.PHRASEOLOGY−(Identification), PROCEED (direction)−BOUND, (other instructions or information as necessary)
page 119
https://www.faa.gov/documentLibrary/media/Order/ATC.pdf
Also - In this case, to disambiguate an instruction to a non-english native speaker it wasn't such a bad idea
?