B757 pilot on short final complains of being too close to aircraft taking off on a crossing runway.

Attributes
ACN	445043
Time
Date	199908
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	agl bound lower : 160 agl bound upper : 180
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : bos.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 4r other
Flight Phase	landing other
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : bos.tower
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14750 flight time type : 200
ASRS Report	445043
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	conflict : airborne less severe conflict : ground less severe non adherence : clearance non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Miss Distance	horizontal : 3500 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance Airport ATC Facility ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

At approximately 160-180 ft, approaching the threshold to land on runway 4R in bos, we observed an aircraft taking off on runway 9 as it crossed the intersection of runway 4R/9. We were not informed of the taking off aircraft and were very surprised when it crossed in front of us. Estimate distance from our aircraft to the one taking off was 3000-4000 ft. Hard to believe this is within legal tolerances. Had he aborted the takeoff a significant potential existed for a collision. Also the surprise of another aircraft taking off directly in front of us was very distracting, causing me to loose concentration momentarily.

Original NASA ASRS Text

Title: B757 PLT ON SHORT FINAL COMPLAINS OF BEING TOO CLOSE TO ACFT TAKING OFF ON A XING RWY.

Narrative: AT APPROX 160-180 FT, APCHING THE THRESHOLD TO LAND ON RWY 4R IN BOS, WE OBSERVED AN ACFT TAKING OFF ON RWY 9 AS IT CROSSED THE INTXN OF RWY 4R/9. WE WERE NOT INFORMED OF THE TAKING OFF ACFT AND WERE VERY SURPRISED WHEN IT CROSSED IN FRONT OF US. ESTIMATE DISTANCE FROM OUR ACFT TO THE ONE TAKING OFF WAS 3000-4000 FT. HARD TO BELIEVE THIS IS WITHIN LEGAL TOLERANCES. HAD HE ABORTED THE TKOF A SIGNIFICANT POTENTIAL EXISTED FOR A COLLISION. ALSO THE SURPRISE OF ANOTHER ACFT TAKING OFF DIRECTLY IN FRONT OF US WAS VERY DISTRACTING, CAUSING ME TO LOOSE CONCENTRATION MOMENTARILY.

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.