Wrangell Sentinel -

JUNEAU (AP) - Two planes collided while on sightseeing flights near Ketchikan in 2019 because the pilots’ views were obscured and aircraft-tracking systems failed to warn them about the other aircraft, federal investigators concluded April 20.

Six people died and 10 people survived the May 13, 2019, midair collision.

The National Transportation Safety Board in its probable-cause finding determined that the limitations of the “see and avoid” concept prevented the pilots from seeing each other before the collision. The board also cited a lack of alerts from the planes’ video display s...