Potential conflict between 2 departure aircraft. See and avoid concept worked, for 1 aircraft.

Attributes
ACN	297998
Time
Date	199503
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gpt
State Reference	MS
Altitude	msl bound lower : 1200 msl bound upper : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : gpt
Operator	other
Make Model Name	Helicopter
Operating Under FAR Part	other : other
Flight Phase	climbout : initial cruise other
Route In Use	arrival : on vectors enroute : on vectors
Flight Plan	VFR
Aircraft 2
Operator	other
Make Model Name	King Air C90 E90
Operating Under FAR Part	other : other
Flight Phase	climbout : initial
Route In Use	approach : visual
Person 1
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 20 flight time total : 8500 flight time type : 3500
ASRS Report	297998
Person 2
Affiliation	government : military
Function	flight crew : first officer
Qualification	pilot : military
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Gpt tower assigned takeoff heading 360 degrees, maintain at or below 1500 ft, contact departure. We did so in sequence. During the climb at about 800 ft MSL, departure described a military C-12 (king air 200) departing behind us off runway who 'had us in sight and would maintain visual separation.' my crew acquired the C12 also and reported that. We were then given a left turn to 340 degrees. We were watching the C12 climb when he entered a right turn and proceeded across our flight path in a trajectory which would have been at our altitude had the climb continued. I initiated a rapid descent and deceleration to pass well below and behind the C12. The flight continued uneventfully to destination. My crew was not sure what instructions were given to the C12 but we were sure that departure advised us that the C12 had us in sight and would maintain visual separation. The C12 never appeared to halt his climb or maneuver away from an intersecting flight path with my aircraft. We did not care since we had the capability to avoid really close proximity, and did so promptly. It may be that the rapid instructions and transfer of controllers failed to indicate who was maintaining separation from whom, clearly, to the C12. I credit my crew chief and our unit cockpit resource management program for early detection of the C12 and rapid conflict resolution.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT BTWN 2 DEP ACFT. SEE AND AVOID CONCEPT WORKED, FOR 1 ACFT.

Narrative: GPT TWR ASSIGNED TKOF HDG 360 DEGS, MAINTAIN AT OR BELOW 1500 FT, CONTACT DEP. WE DID SO IN SEQUENCE. DURING THE CLB AT ABOUT 800 FT MSL, DEP DESCRIBED A MIL C-12 (KING AIR 200) DEPARTING BEHIND US OFF RWY WHO 'HAD US IN SIGHT AND WOULD MAINTAIN VISUAL SEPARATION.' MY CREW ACQUIRED THE C12 ALSO AND RPTED THAT. WE WERE THEN GIVEN A L TURN TO 340 DEGS. WE WERE WATCHING THE C12 CLB WHEN HE ENTERED A R TURN AND PROCEEDED ACROSS OUR FLT PATH IN A TRAJECTORY WHICH WOULD HAVE BEEN AT OUR ALT HAD THE CLB CONTINUED. I INITIATED A RAPID DSCNT AND DECELERATION TO PASS WELL BELOW AND BEHIND THE C12. THE FLT CONTINUED UNEVENTFULLY TO DEST. MY CREW WAS NOT SURE WHAT INSTRUCTIONS WERE GIVEN TO THE C12 BUT WE WERE SURE THAT DEP ADVISED US THAT THE C12 HAD US IN SIGHT AND WOULD MAINTAIN VISUAL SEPARATION. THE C12 NEVER APPEARED TO HALT HIS CLB OR MANEUVER AWAY FROM AN INTERSECTING FLT PATH WITH MY ACFT. WE DID NOT CARE SINCE WE HAD THE CAPABILITY TO AVOID REALLY CLOSE PROX, AND DID SO PROMPTLY. IT MAY BE THAT THE RAPID INSTRUCTIONS AND TRANSFER OF CTLRS FAILED TO INDICATE WHO WAS MAINTAINING SEPARATION FROM WHOM, CLRLY, TO THE C12. I CREDIT MY CREW CHIEF AND OUR UNIT COCKPIT RESOURCE MGMNT PROGRAM FOR EARLY DETECTION OF THE C12 AND RAPID CONFLICT RESOLUTION.

Data retrieved from NASA's ASRS site as of July 2007 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.