🛠️ Invention or technique

Ground proximity warning system

Sistema de alerta de proximidad al suelo

Date
1974 · confidence medium
Place
Redmond, Washington, United States
Credited to
C. Donald Bateman
Field
Movement

What it is

An avionics system that alerts the crew when an aircraft is in imminent danger of colliding with terrain or an obstacle, a type of terrain awareness and warning system (TAWS). It drastically reduced controlled-flight-into-terrain accidents.

Developed by engineer C. Donald Bateman at Sundstrand Data Control (later Honeywell), in Redmond, Washington.

What it led to

  • a drastic reduction in controlled-flight-into-terrain accidents
  • a regulatory requirement in commercial aviation worldwide
  • evolution into the enhanced EGPWS system in 1996

Links

Sources✓ verified 2026-09-28