Small aircraft making a visual approach had a confliction with a departure aircraft.

Attributes
ACN	120827
Time
Date	198908
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mht
State Reference	NH
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mht
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : takeoff
Route In Use	departure other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 1300
ASRS Report	120827
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : airborne less severe non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 750 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

While being vectored for a visual approach to runway 24, traffic departing mht was called out as 12 O'clock, 1 mi, same altitude, also under control by mht departure control. Aircraft appeared from haze and overcast on collision course when 500-1000' away. Strong evasive maneuvers by both aircraft avoided collision. Had WX been solid IMC this would have been a midair. ATC should have provided vectoring to maintain separation. Again, both aircraft were under positive control by mht departure.

Original NASA ASRS Text

Title: SMA MAKING A VISUAL APCH HAD A CONFLICTION WITH A DEP ACFT.

Narrative: WHILE BEING VECTORED FOR A VISUAL APCH TO RWY 24, TFC DEPARTING MHT WAS CALLED OUT AS 12 O'CLOCK, 1 MI, SAME ALT, ALSO UNDER CTL BY MHT DEP CTL. ACFT APPEARED FROM HAZE AND OVERCAST ON COLLISION COURSE WHEN 500-1000' AWAY. STRONG EVASIVE MANEUVERS BY BOTH ACFT AVOIDED COLLISION. HAD WX BEEN SOLID IMC THIS WOULD HAVE BEEN A MIDAIR. ATC SHOULD HAVE PROVIDED VECTORING TO MAINTAIN SEPARATION. AGAIN, BOTH ACFT WERE UNDER POSITIVE CTL BY MHT DEP.

Data retrieved from NASA's ASRS site as of August 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.