Narrative:

There is a tower about 1/2 mile or less to the right of centerline of runway 6 at mht that is about 500 ft tall and is not depicted on any chart or NOTAM. Maybe 2 miles from threshold. I believe it to be a hazard to air navigation. Callback conversation with reporter revealed the following information: the reporter reiterated concern about the hazard potential of the tower/towers, especially during a non routine occurrence, like an engine failure, where straying off the centerline is a distinct possibility. Departures from runway 24, are not exempt for the same reason. Supplemental information: a 'kmht' tower specialist revealed, the tower observed by the reporter is a 'radio antenna' tower. (It's depicted on the new york sectional as being a 'group obstruction,' with an MSL elevation of 548 ft) its location is approximately 1.5 to 2 miles from the airport, (between the highway and the river) and is known to have existed for at least 10 to 12 yrs. Note: during our discussion the 609 foot obstruction, depicted on the commercial charts for all three apches to runway 6, was brought up. According to the specialist this obstruction does not exist and is not depicted on the new york sectional.

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Original NASA ASRS Text

Title: A B737 CREW, ON APCH TO RWY 6 AT KMTH, OBSERVED A TWR/TWRS WHICH THEY BELIEVE TO BE A HAZARD TO AIR NAVIGATION.

Narrative: THERE IS A TWR ABOUT 1/2 MILE OR LESS TO THE RIGHT OF CENTERLINE OF RWY 6 AT MHT THAT IS ABOUT 500 FT TALL AND IS NOT DEPICTED ON ANY CHART OR NOTAM. MAYBE 2 MILES FROM THRESHOLD. I BELIEVE IT TO BE A HAZARD TO AIR NAVIGATION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR REITERATED CONCERN ABOUT THE HAZARD POTENTIAL OF THE TWR/TWRS, ESPECIALLY DURING A NON ROUTINE OCCURRENCE, LIKE AN ENG FAILURE, WHERE STRAYING OFF THE CENTERLINE IS A DISTINCT POSSIBILITY. DEPARTURES FROM RWY 24, ARE NOT EXEMPT FOR THE SAME REASON. SUPPLEMENTAL INFO: A 'KMHT' TWR SPECIALIST REVEALED, THE TWR OBSERVED BY THE RPTR IS A 'RADIO ANTENNA' TWR. (IT'S DEPICTED ON THE NEW YORK SECTIONAL AS BEING A 'GROUP OBSTRUCTION,' WITH AN MSL ELEVATION OF 548 FT) ITS LOCATION IS APPROX 1.5 TO 2 MILES FROM THE ARPT, (BTWN THE HIGHWAY AND THE RIVER) AND IS KNOWN TO HAVE EXISTED FOR AT LEAST 10 TO 12 YRS. NOTE: DURING OUR DISCUSSION THE 609 FOOT OBSTRUCTION, DEPICTED ON THE COMMERCIAL CHARTS FOR ALL THREE APCHES TO RWY 6, WAS BROUGHT UP. ACCORDING TO THE SPECIALIST THIS OBSTRUCTION DOES NOT EXIST AND IS NOT DEPICTED ON THE NEW YORK SECTIONAL.

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.