What is Really going on, and WHY is the military jeopardizing civilian & commercial air traffic?
(Presumption is military importance overides public safety?)
Yet one more unusual hazard for the month of September 2015.
Consider this our public service announcement and adjust your flight plans accordingly.
Airsafety is jeopardized because TCAS and ACAS is not functioning in some regions.
Several professional associations are reporting disruption alerts, see:
ADS-B and TCAS will be disrupted during the whole month of September according to a NOTAM covering the U.S. Southeast. The FAA is warning all pilots flying from Virginia to Florida for the month of September that ADS-B and TCAS will be “unreliable” because of “military activities.” The NOTAM was posted less than 24 hours before it was to take effect on Sept. 2 and gives only vague descriptions of what might happen.
“We want to make you aware of the following late breaking NOTAMs that have been issued due to military activities that may affect ADS-B traffic service over Virginia, North Carolina, South Carolina, Georgia, and Florida beginning 1:00 am EDT September 2, 2015 until midnight EDT October 1, 2015.
The NOTAM numbers are as follows:
5/2817 New York Center (ZNY)
5/2818 Washington Center (ZDC)
5/2819 Jacksonville Center (ZJX)
5/2820 Miami Center (ZMA)
5/2834 NY Oceanic (ZWY)
For reference, here is the text from the ZNY NOTAM:
A0369/15 (FDC 5/2817) – SPECIAL NOTICE…DUE TO MILITARY ACTIVITIES ON 1030/1090 MHZ, THE TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) AND AUTOMATIC DEPENDENT SYSTEM BROADCAST (ADS- SURVEILLANCE MAY BE UNRELIABLE IN THE AIRSPACE OVER THE STATES OF VIRGINIA, NORTH CAROLINA, SOUTH CAROLINA, GEORGIA, AND FLORIDA, AND EXTENDING APPROXIMATELY 200NM OFFSHORE. PILOTS ARE ADVISED THAT THE TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) MAY FAIL TO ESTABLISH TRACKS ON NEARBY AIRCRAFT AND MAY FAIL TO RECEIVE TRAFFIC ALERTS (TA) AND/OR RESOLUTION ADVISORIES (RA). FURTHER, PILOTS ARE ADVISED THAT TRACKS MAY FIRST APPEAR WITHIN CLOSE PROXIMITY TO THEIR AIRCRAFT AND MAY IMMEDIATELY GO INTO TA/RA STATUS. FALSE ALERTS ARE NOT EXPECTED TO BE GENERATED BY THIS MILITARY ACTIVITY AND ANY ALERTS SHALL BE TREATED AS REAL ”
National Business Aviation Association (NBAA)
“Due to military activities, the TCAS and ADS-B surveillance may be unreliable in the airspace over Virginia, North Carolina, South Carolina, Georgia and Florida, and extending approximately 200 nautical miles offshore, from 1 a.m. EDT (0500z) Sept. 2 until midnight EDT (0459z) on Oct. 1.
Pilots are advised that the traffic alert and TCAS may fail to establish tracks on nearby aircraft and may fail to receive traffic alerts (TA) or resolution advisories (RA). Operators should be aware that tracks may first appear within close proximity to their aircraft, and may immediately go into TA/RA status.
Pilots are advised to maintain an increased visual awareness in this area. If operators believe that an aircraft should have triggered an alert, the incident should be reported to air traffic control as soon as possible.”…