Very Low Frequency Acoustic Detection of Submarines

This report examines the detectability of blade rate lines for several classes of Soviet submarines. The Naval Research Laboratory has measured low frequency (VLF) transmission loss and ambient noise at sites in the Atlantic Ocean and Norwegian Sea. The results are used to calculate the array gain n...

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Bibliographic Details
Main Authors: Dixon, William C., Rollins, C. R.
Other Authors: NAVAL RESEARCH LAB WASHINGTON DC
Format: Text
Language:English
Published: 1977
Subjects:
Undersea and Antisubmarine Warfare
Acoustic Detection and Detectors
*ACOUSTIC DETECTION
*SUBMARINE DETECTION
*ANTISUBMARINE WARFARE
INTERACTIONS
AMBIENT NOISE
SUBMARINE HULLS
VERY LOW FREQUENCY
UNDERWATER TRACKING
LOGS(VELOCITY METERS)
ATLANTIC OCEAN
NORWEGIAN SEA
USSR
PROPELLERS(MARINE)
PE62759N
WUS0164
Norwegian Sea
Online Access:http://www.dtic.mil/docs/citations/ADC010105
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADC010105
Description
Summary:This report examines the detectability of blade rate lines for several classes of Soviet submarines. The Naval Research Laboratory has measured low frequency (VLF) transmission loss and ambient noise at sites in the Atlantic Ocean and Norwegian Sea. The results are used to calculate the array gain necessary to detect present and furture classes of Soviet submarines at these Atlantic Ocean and Norwegian Sea sites. The results are presented for submarine speeds of interest. The problem of array size needed to obtain necessary array gain and the problem of signal spatial coherence are considered.

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