Document Details


Title:
OPERATION DOMINIC, SHOT SWORD FISH, PROJECT OFFICERS REPORT-PROJECT 1.3B: EFFECTS OF AN UNDERWATER NUCLEAR EXPLOSION ON HYDROACOUSTIC SYSTEMS (DELETED)
Author(s):
MCMILLAN, T [UNITED STATES NAVY - DEPARTMENT OF]; DELAHOUSSAYE, W P [UNITED STATES NAVY - DEPARTMENT OF]; JOHNSON, C T [UNITED STATES NAVY - DEPARTMENT OF]
Subject Terms:
DOMINIC I OPERATION; SWORDFISH EVENT; UNDERWATER EXPLOSIONS; SHIPS; BLAST EFFECTS; DAMAGE; EQUIPMENT
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
Declassification Status:
Sanitized
Document Pages:
0062
Accession Number:
NV0051059
Document Number(s):
POR2003EX
Originating Research Org.:
UNITED STATES NAVY - DEPARTMENT OF
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE OBJECTIVES OF PROJECT 1.3 WERE TO DETERMINE AND EVALUATE THE EFFEC TS OF AN UNDERWATER NUCLEAR EXPLOSION ON THE OPERATIONAL CAPABILITIES OF SHIPBOARD SONAR AND OTHER TYPES OF HYDROACOUSTIC SYSTEMS. (THE EFF ECTS ON SHIPBOARD SONARS AT CLOSE RANGE WERE REPORTED UNDER PROJECT 1. 3A). PROJECT 1.3B INCLUDED ALL MEASUREMENTS AT RANGES GREATER THAN 10 NAUTICAL MILES AND THE RESULTS OF THESE MEASUREMENTS CONSTITUTE THE S UBJECT OF THIS REPORT. SPECIFICALLY, THIS REPORT CONCERNS THE EFFECTS OF THE UNDERWATER NUCLEAR EXPLOSION, SWORD FISH, ON: A. LONG-RANGE AC TIVE DETECTION (LORAD) SYSTEMS AT THE FIRST CONVERGENCE ZONE (25 TO 30 MILES). B. PASSIVE SHIPBOARD OR SUBMARINE SONARS AT A FEW HUNDRED MI LES. C. LONG-RANGE PASSIVE DETECTION AND SURVEILLANCE AT SOUND SURVEI LLANCE SYSTEM (SOSUS) AND MISSILE IMPACT LOCATING SYSTEM (MILS) STATIO NS AT SEVERAL HUNDRED TO SEVERAL THOUSAND MILES. A SUBMARINE STATION AT THE FIRST CONVERGENCE ZONE AND FIVE SHIPBOARD STATIONS AT RANGES FR OM 200 MILES TO 5,000 MILES RECORDED SIGNALS FROM HYDROPHONES SUSPENDE D AT VARIOUS DEPTHS TO APPROXIMATELY 2,000 FEET. SUBMARINES ON OTHER ASSIGNMENTS RECORDED SIGNALS ON STANDARD SUBMARINE SONAR EQUIPMENT ON A NOT-TO-INTERFERE BASIS. SOSUS AND MILS STATIONS OPERATED NORMALLY D URING THE PERIOD AND ALSO MADE SPECIAL MAGNETIC-TAPE AND STRIP-CHART R ECORDINGS OF SIGNALS FROM SINGLE HYDROPHONES FROM BEFORE BURST TIME TO SEVERAL HOURS AFTER BURST. ALTHOUGH THE STATION AT THE FIRST CONVERG ENCE ZONE WAS NOT AT THE PROPER RANGE TO MAKE MEASUREMENTS IN THE REGI ON OF GREATEST PRESSURE, WHERE PRESSURES OF THE ORDER OF 300 PSI WERE CONSIDERED POSSIBLE, PEAK PRESSURES UP TO [ ] WERE RECORDED. UNDER ISOVELOCITY CONDITIONS, PEAK PRESSURES OF THE ORDER OF [ ] WOULD HAVE BEEN EXPECTED. THUS, THE CONVERGENCE-ZONE PRESSURES MAY BE CONSIDERABLY LARGER THAN WOULD BE EXPECTED WITHOUT REFRACTION, BUT TH E MAGNITUDE OF THE POSSIBLE THREAT TO EQUIPMENT OPERATING IN THE CONVE RGENCE ZONE HAS NOT BEEN POSITIVELY DETERMINED. FOR SHIPBOARD OR SUBM ARINE SONAR SYSTEMS OPERATING WITHIN A FEW HUNDRED MILES OF THE BURST, THE EFFECT OF THE BURST [ ]. THIS RESULT WOULD BE EXP ECTED FROM THE FACT THAT THE BACKGROUND NOISE IN THESE SYSTEMS IS NORM ALLY MUCH HIGHER THAN FOR LAND-BASED STATIONS AND THUS THEY ARE LIMITE D TO HIGHER SIGNAL LEVELS. ALTHOUGH SOME MASKING OF SHIPS' SIGNALS RE CEIVED ON SHIPBOARD STATIONS OPERATING WITHIN SEVERAL HUNDRED MILES OF A NUCLEAR EXPLOSION IN THE OPEN OCEAN MUST BE EXPECTED, THE DURATION OF SUCH MASKING SHOULD BE LIMITED TO A VERY FEW MINUTES.


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