I flew on a test flight aboard Honeywell's Boeing 757 jet to see new tech that could prevent airliners from colliding on runways — a big issue lately.

Honeywell Aerospace, with 2024 revenues estimated at $15 billion, will become a major player in the aerospace sector, providing technology and solutions for commercial and defense aircraft.

Aerospace titan Honeywell announced Thursday that it will split into three independent and publicly traded companies. The ...