The Black Hawk helicopter may have been flying with “bad data” and didn’t hear all air traffic control instructions before ...

Barometric altimeters are most common, and measure altitude above sea level using atmospheric pressure. Modern commercial ...

NTSB's Friday briefing about the fatal midair collision near DCA highlighted ongoing investigations into potential radio communication lapses.

The National Transportation Safety Board gave an update on its investigation into the deadly midair collision between an ...

The helicopter was supposed to be no higher than 200 feet. However, Homendy says it's unclear whether the altimeters in the helicopter were showing the pilots the proper altitude. She says ...