Accession Number : ADA131034

Title :   Loran-C Nonprecision Approaches in the Northeast Corridor.

Descriptive Note : Final rept. Sep 81-Jan 82,


Personal Author(s) : Lorge,Frank

PDF Url : ADA131034

Report Date : Jun 1983

Pagination or Media Count : 70

Abstract : This report describes a flight test designed to investigate the suitability of Loran-C as a nonprecision approach aid in the Northeast Corridor (NEC). Approaches were flown at six selected airports in the NEC by a CH-53A helicopter using Loran-C for course guidance. Accuracy criteria specified in Advisory Circular (AC) 90-45A were used as the standard for acceptability. Data were recorded for Loran in area calibrated and uncalibrated modes along with very high frequency omnidirectional radio range (VOR)/distance measuring equipment (DME) raw sensor data for comparison. The results show that the group repetition interval (GRI)-9960 Northeast U.S. Loran-C chain met AC 90-45A requirements for nonprecision approaches in all cases when a local area calibration was applied. The uncalibrated mode met AC 95-45A requirements at four of the six airports. It was determined that the Seneca, Nantucket, Carolina Beach triad should be used for navigation throughout the flight test area. (Author)

Descriptors :   *Loran, *Distance measuring equipment, *Helicopters, *Approach, *Navigation, Repetition rate, Flight testing, Detectors, Test facilities, Airports, Standards, Accuracy, Intervals, Acceptability

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE