FAA Office of Aerospace Medicine
Civil Aerospace Medical Institute

Report No: DOT/FAA/AM-21/10

Title and Subtitle: 3-D Safety Margin Profiles when Using Head-Up Display (HUD) for Takeoff in Low Visibility and High Crosswind Conditions

Report Date: March 2021

Authors: Kratchounova D, Choi I, Mofle T, Miller L, Hesselroth J, Stevenson S, Humphreys M

Abstract: The role of crosswinds in the relationship between crew workload and size of safety margin during low visibility takeoffs using HUD was examined. 3-dimensional (3-D) safety margin profiles for different low visibility takeoff conditions and guidance types were generated utilizing the raw and standardized scores for the six NASA-TLX subscales, with and without the effect of crosswinds.

The results underlined the critical role for aviation safety of a) building an evocative shared mental model within the pilots' community of the multi-faceted nature of safety margin; and b) having a clear understanding of the complex interplay between the many factors that affect its shape and size.

Key Words: Safety Margin, Crew Workload, Head-up Display (HUD), NASA-TLX, Low Visibility Operations

No. of Pages: 26