VISIBILITY OF NAVIGATIONAL LIGHTS IN A DESTROYER ARRAY.

Abstract

Visibility measurements were conducted under known normal nighttime operating conditions at sea by the U. S. Navy Mine Defense Laboratory (MDL) on a simulated destroyer running light array to determine its maximum range of identification. The array was tested with plain and fresnel lenses successively with 50/50-watt lamps and 100/100-watt lamps. A calibrated light range established in the Gulf of Mexico permitted continuous monitoring of the atmospheric transmission rate during all visibility tests. Tests were conducted under various atmospheric conditions with several shipboard military observers whose vision has been tested and accepted as normal. These tests indicate that the colored sidelights in the destroyer array are visible 3.5 nautical miles (Average), the white range and masthead lights merge at approximately 5 miles, and the range light is visible to the horizon when the atmospheric transmission rate is 70 percent per nautical mile. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1966
Accession Number
AD0487176

Entities

People

  • Herbert Larrimore

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Destroyers
  • Fresnel Lenses
  • Identification
  • Lenses
  • Measurement
  • Military Forces (United States)
  • Military Organizations
  • Monitoring
  • Nautical
  • Navigational Lights
  • Navy
  • Observers
  • Shipboard
  • Visibility

Readers

  • Atmospheric Remote Sensing.
  • Maritime Security/Maritime Homeland Security
  • Mathematics or Statistics