A pilot departing a non-towered controlled airport climbing under class C airspace reported being ve...

Narrative:

Upon departing a non-towered field we have class C airspace at 1700 feet MSL. Our procedure and what I teach my students is to level off at 1500 feet MSL if 2-way contact has not yet been established with approach. One day; after numerous attempts to reach approach by my student; I keyed my microphone in an attempt to reach approach while at 1600 feet MSL. The controller responded with aircraft calling off the airport turn right 090 degrees immediately; and said we went under an air carrier aircraft. We never entered their airspace so we did not violate the charlie [airspace] nor could I see another aircraft at that position as I was traveling north while the other aircraft approached from my east; which placed them in my blind spot. They passed and we continued own navigation once ATC cleared us to do so.I think this could have been avoided by calling ATC sooner; however; I don't want to leave our CTAF too early; especially on a busy VFR day in the traffic pattern. Also; I think adjusting the altitude to 1300 feet MSL would help; but prefer not to for noise abatement. I would like the extra 200 feet if I have an engine problem. Also; I wish ATC would vector traffic further out from our non-towered field instead of bringing them right over the top of us.

Original NASA ASRS Text

Title: A pilot departing a non-towered controlled airport climbing under Class C airspace reported being vectored away from air carrier traffic immediately upon contact with the TRACON.

Narrative: Upon departing a non-towered field we have Class C Airspace at 1700 feet MSL. Our procedure and what I teach my students is to level off at 1500 feet MSL if 2-way contact has not yet been established with Approach. One day; after numerous attempts to reach Approach by my student; I keyed my microphone in an attempt to reach Approach while at 1600 feet MSL. The controller responded with aircraft calling off the airport turn right 090 degrees immediately; and said we went under an air carrier aircraft. We never entered their airspace so we did not violate the Charlie [airspace] nor could I see another aircraft at that position as I was traveling north while the other aircraft approached from my east; which placed them in my blind spot. They passed and we continued own navigation once ATC cleared us to do so.I think this could have been avoided by calling ATC sooner; however; I don't want to leave our CTAF too early; especially on a busy VFR day in the traffic pattern. Also; I think adjusting the altitude to 1300 feet MSL would help; but prefer not to for noise abatement. I would like the extra 200 feet if I have an engine problem. Also; I wish ATC would vector traffic further out from our non-towered field instead of bringing them right over the top of us.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1546202
Time
Date	201805
Local Time Of Day	0601-1200
Place
Locale Reference	MBO.Airport
State Reference	MS
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Climb
Aircraft 2
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Person 1
Function	Instructor
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 1522 Flight Crew Type 1100
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict

A pilot departing a non-towered controlled airport climbing under class C airspace reported being vectored away from air carrier traffic immediately upon contact with the TRACON.