Accession Number : AD0714057
Title : Focusing and Leveling of Battery-Powered Shore Lights.
Descriptive Note : Final rept.,
Corporate Author : COAST GUARD BALTIMORE MD FIELD TESTING AND DEVELOPMENT CENTER
Personal Author(s) : Lomer, Lloyd R. ; O'Connell, J. M.
Report Date : 14 OCT 1970
Pagination or Media Count : 91
Abstract : Four marine signal lanterns were focused and leveled by ten 'adjusters' in an attempt to determine the focus/level errors that can be expected under field conditions. The angle between the horizon and the center of the beam was measured as an indication of the focus/level errors. The percentage reduction in beam intensity at the horizon was measured relative to the intensity found at the beam center. Statistical analysis of the data is included. Relative merits and deficiencies between the lanterns and focusing procedures are studied.
Descriptors : *NAVIGATIONAL LIGHTS, ALIGNMENT, BEACON LIGHTS, NAVIGATIONAL AIDS, FOCUSING, HORIZONTAL INDICATORS, SCREWS, ACCURACY, ERRORS, INTENSITY, STATISTICAL ANALYSIS.
Subject Categories : Navigation and Guidance
Air Condition, Heating, Lighting & Ventilating
Distribution Statement : APPROVED FOR PUBLIC RELEASE