En course or on course

[Jonathan_tcu]

And my second question    is there a real difference between 'climb, turn left/right, proceed, depart (departing city/location) on/encourse' ?

[Moderator: Added from other thread]: Everytime I hear the FSS clear flights, I always hear "Depart Timmins on course" or "Depart rwy XX, turn left (or) turn right on course" Or "Depart rwy XX and proceed on course" then the squawk code is given. Is there a real vocabulary technical difference between the on course instructions? I assume the on course is the requested airway or flight planned route before or after any deviations.

[digger]

I've never heard or seen the term "encourse". Might you be confusing "en route" with "on course"?

"On course", meaning following the prescribed course, and "en route" meaning "On or along the way". (That definition is from Dictionary.com.)

http://dictionary.reference.com/search?r=2&q=en%20route

[Jason]

I assume the on course is the requested airway or flight planned route before or after any deviations.

That's correct.  They are the same/similar instruction, although "[proceed] on course" for IFR aircraft most likely means their cleared route, while VFR a/c instructed to "proceed on course" is usually their requested route/direction.