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May 09, 2009

ANN's Daily Aero-Term (05.09.09):

Altimeter Setting That pressure value to which an aircraft altimeter scale is set so that it will indicate the altitude above mean sea-level of an aircraft on the ground at the location for which the value was determined.

Aero-Linx: US Air National Guard The Air National Guard enforces federal authority, suppresses insurrection and defends the nation when mobilized by the president, Congress, or both. Units augment the Air Force by participating in operations and exercises worldwide by direction of the Air Staff, major commands or joint/unified commands.

"Neither helicopter was equipped with a traffic collision avoidance system, nor was such a system required. Had such a system been on board, the Board noted, it likely would have alerted the pilots to the traffic conflict so they could take evasive action before the collision. However, according to Federal regulations, ultimately the pilots are responsible for maintaining vigilance and to be on alert and avoid other aircraft at all times." Source: From Probable Cause statements by the NTSB in regards to a fatal mid-air collision that occurred between two Bell 407 EMS helos over Flagstaff, AZ, on June 29, 2008.