Wake turbulence encounter.

Attributes
ACN	283596
Time
Date	199409
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	agl bound lower : 300 agl bound upper : 300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bos
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 180 flight time total : 6900
ASRS Report	283596
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 300
Supplementary
Primary Problem	Chart Or Publication
Air Traffic Incident	other
Situations
Airport	other physical facility

Narrative:

While flying an ILS to runway 4R at bos, ATC advised us that a tall masted sailing ship was in the channel. We replied that we had the ship in sight moving from (our) left to (our) right, to the left of centerline. As we flew over the channel the ship was just slightly to the left of the ILS centerline. The captain deviated slightly to the right and stayed slightly above the glide path. I observed the ship through the captain's left aft window as we went by. After landing we were notified that tower observed some damage to the top of the ship by wake turbulence.

Original NASA ASRS Text

Title: WAKE TURB ENCOUNTER.

Narrative: WHILE FLYING AN ILS TO RWY 4R AT BOS, ATC ADVISED US THAT A TALL MASTED SAILING SHIP WAS IN THE CHANNEL. WE REPLIED THAT WE HAD THE SHIP IN SIGHT MOVING FROM (OUR) L TO (OUR) R, TO THE L OF CTRLINE. AS WE FLEW OVER THE CHANNEL THE SHIP WAS JUST SLIGHTLY TO THE L OF THE ILS CTRLINE. THE CAPT DEVIATED SLIGHTLY TO THE R AND STAYED SLIGHTLY ABOVE THE GLIDE PATH. I OBSERVED THE SHIP THROUGH THE CAPT'S L AFT WINDOW AS WE WENT BY. AFTER LNDG WE WERE NOTIFIED THAT TWR OBSERVED SOME DAMAGE TO THE TOP OF THE SHIP BY WAKE TURB.

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.