Accession Number : AD0833678

Title :   UNDERWATER LIGHT ATTENUATION DATA TAKEN NEAR SAN CLEMENTE ISLAND,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s) : Gilbert, Gary

Report Date : APR 1968

Pagination or Media Count : 26

Abstract : The Naval Weapons Center supplied personnel and instrumentation to measure the volume light attenuation coefficient of the water and to study the bottom geology of the California Channel near San Clemente Island. The tests showed that the attenuation structure of these waters is similar to that generally found at other test locations, having a surface attenuation layer approximately 50 meters thick which changes abruptly to a uniformly clear mass of water that extends to the maximum lowering depth of the null-balance transmissometer or the floor of the ocean, whichever occurs first. Most test stations also showed a thin layer of higher attenuation from 30 to 50 meters beneath the surface. (Author)

Descriptors :   (*UNDERWATER LIGHT, ATTENUATION), ATTENUATION, VISIBILITY, INSTRUMENTATION, UNDERWATER EQUIPMENT, LIGHT TRANSMISSION, MEASUREMENT, OPTICAL EQUIPMENT, SURFACE PROPERTIES, ISLANDS, OCEANOGRAPHIC DATA, PACIFIC OCEAN, CALIFORNIA.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE