United States Department of Transportation
i
CDI Sensitivity and Crosstrack Error on Nonprecision Approaches
-
1991-01-01
[PDF-1.73 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Edition:Final Report June 1988 - June 1990
-
Corporate Publisher:
-
Abstract:This study was conducted to determine the influence of course deviation
indicator (CDI) sensitivity on pilot tracking error during nonprecision approaches.
Twelve pilots flew an instrumented single-engine airplane on 144 approaches at six
different levels of CDI sensitivity. The sensitivities ranged from 15,190 feet
(2.5 nautical miles) to 475 feet (0.08 nautical miles) for a full-scale deflection.
Increases in sensitivity of this magnitude decreased crosstrack Root Mean Square
(RMS) error from an average of 0.22 to 0.04 nautical miles. Magnitude of the
error and the influence of sensitivity on that magnitude were affected by distance
from the missed approach point. Pilots reported that increases in sensitivity
increased their workload and changed their distribution of attention among the
aircraft instruments used for navigation and directional control.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
