DEEP-SEA LIGHT ATTENUATION MEASUREMENTS AT 2,000-METER DEPTHS

The null-balance transmissometer (NBT) is an instrument being developed to measure the volume attenuation coefficient of light in the sea to depths of 2,000 meters. In earlier tests (AD-613 017), the operation of the NBT was tested in its working environment to depths of 700 meters. In this report,...

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Bibliographic Details
Main Author: GILBERT,Gary D
Format: Report
Language:English
Subjects:
ATTENUATION
OCEANOGRAPHY
Optics
Physical and Dynamic Oceanography
SEA WATER
UNDERWATER
UNDERWATER EQUIPMENT
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Summary:The null-balance transmissometer (NBT) is an instrument being developed to measure the volume attenuation coefficient of light in the sea to depths of 2,000 meters. In earlier tests (AD-613 017), the operation of the NBT was tested in its working environment to depths of 700 meters. In this report, the first deep sea tests of the NBT, in which measurements were made to the 2,000-meter maximum depth capability of the instrument, are documented. The tests were conducted at 10 locations in the North Pacific from the Aleutian Islands to the island of Oahu in the Hawaiian Archipelago. (Author)