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ENGINEERING ROLE IN NAVOCEANO SHIP’S ENVIRONMENT Procurement of New Systems. Configuration Management. Installation Testing and Final Acceptance Ship Modifications (Re-designs) Training Maintenance New Technology. T-AGS-60. MARY SEARS SONAR SYSTEMS. EM121A – 12 KHZ DEEP WATER MULTIBEAM

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T ags 60

ENGINEERING ROLEIN NAVOCEANOSHIP’S ENVIRONMENTProcurement of New Systems.Configuration Management.InstallationTesting and Final AcceptanceShip Modifications (Re-designs)TrainingMaintenanceNew Technology


T ags 60

T-AGS-60


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MARY SEARS SONAR SYSTEMS

EM121A – 12 KHZ DEEP WATER MULTIBEAM

EM1002 – 95 KHZ SHALLOW WATER MULTIBEAM

SUBBOTTOM PROFILER – 3.5 KHZ FM AND CW

DUAL FREQUENCY SINGLE BEAM – 12 & 33 KHZ

EM3000 (HSL) – 300 KHZ SINGLE ARRAY MULTIBEAM

EA502 – DUAL FREQUENCY SINGLE BEAM

BROAD BAND ADCP – 150 KHZ


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RECEIVER RACK


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TRANSMITTER RACK


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OPERATOR CONSOLE


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DPC MONITORS


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EM121A Projector Installation


Em 121a projectors

EM-121APROJECTORS


Installation

INSTALLATION


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TESTINGCONDUCT PERIODIC ACOUSTIC TESTING TO MAINTAIN HIGH LEVELS OF PERFORMANCE FOR ACOUSTIC SYSTEMS- SEVERE BUBBLE SWEEP DOWN- FAILED INITIAL AT-SEA TEST VERYHIGH FLOW NOISE


Final acceptance test

ADDED BUBBLE FENCES

MODIFIED APPENDAGE FAIRING

FLOW NOISE REDUCED TO 49 Db

PASSED SAT EXCEPT FOR SHALLOW WATER ACCURACY

SIMRAD REDUCED OUTER BEAM ARTIFACTS

FINAL ACCEPTANCE TEST


Installation of bilge keels

INSTALLATION OF BILGE KEELS


Bubble sweepdown fences

BUBBLE SWEEPDOWNFENCES


Post yard shakedown

POST YARD SHAKEDOWN

START A LOG OF EVENTS INCLUDING ENVIRONMENTAL CONDITIONS, ETC

VERIFY THAT ALL INSTALLATION PARAMETERS AND OFFSETS ARE CORRECT

VERIFY THAT HARDWARE IS OPERATING CORRECTLY (BITE TEST)

COMPARE CTD PROFILE WITH SSSV SURF DATA/SV PROFILER

PERFORM SYSTEM CALIBRATION

CONDUCT SMALL AREA SURVEY WITH CROSSING LINES AND 50% OVERLAP

EDIT AND PROCESS DATA FOR ACCURACY AND ARTIFACTS

DOCUMENT SYSTEM CONFIGURATION

MAKE SYSTEM BACKUPS

WRITE REPORT ON RESULTS


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AVERAGE TIME FRAMEFOR A TYPICAL PROCUREMENT AND INSTALLATION OF A MULTIBEAM SYSTEMON A TAGS-60 CLASS SHIP( 3 YEARS )

  • PROCUREMENT ( 12- 24 MONTHS)

  • INSTALLATION ( 4 MONTHS)

    • CONDUCT A SHIPCHECK.

    • DEVELOP AND SUBMIT SPECIFICATIONS TO MSC AND BIDDERS / CONTRACT AWARD.

    • ACTUAL INSTALLATION (1 MONTH).

  • TESTING AND TRAINING (2 MONTHS - OPTIMISTIC APPROACH)

  • CONFIGURATION MANAGEMENT AND DOCUMENTATION.


Maintenance and housekeeping issues

MAINTENANCE AND HOUSEKEEPING ISSUES

SIGNIFICANT TRANSDUCER FOULING HAS BEEN OBSERVED ON SHIPS.

SIGNIFICANT ACOUSTIC WINDOW FOULING HAS BEEN OBSERVED ON SHIP.S

SONAR FAIRING DAMAGE HAS BEEN NOTED ON T-AGS-CLASS SHIPS.


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MAINTENANCE - ADCP TRANSDUCER


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MAINTENANCE / DOMES


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MAINTENANCE

EM121 RECEIVE ARRAY


Refurbished sonar domes

REFURBISHEDSONAR DOMES


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EM-1002/1000 TRANSDUCER


Maintenance

MAINTENANCE


Maintenance conclusions and recommendations

MAINTENANCE CONCLUSIONSAND RECOMMENDATIONS

SONAR PERFORMANCE IS CONSIDERABLY DEGRADED DUE TO UNDERHULL CONDITIONS.

ANY INSTALLATION SHOULD CONSIDER AND INSTITUTE UNDERHULL MAINTENANCE PROGRAMS TO PERIODICALLY GROOM SHIPS TO OPTIMIZE SONAR PERFORMANCE


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FUTURE PLANS

“SONAR REPLACEMENTS”

EM121A STARTING FY06

SUB-BOTTOM PROFILER FY06

EM1002 FY08


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EM121A REPLACEMENT REQUIREMENTS

  • 1 X 1 DEGREE

  • FULL OCEAN DEPTH

  • MINIMUM OF 190 BEAMS

  • 150 DEGREE SWATH COVERAGE

  • 0.1 % ACCURACY

  • OUTPUT DEPTH, IMAGERY, RAW HYDROPONE

  • ROLL, PITCH, HEAVE, YAW COMPENSATED

  • INSTALLATION OPTIONS

    • “V” RECESSED IN HULL

    • FLAT ARRAY ON WING

  • INTEGRATED SUBBOTTOM PROFILER


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  • The following slides show a typical installation

    of a EM120 Deep Water Multibeam

  • Includes a narrow beam subbottom profiler that

    uses the same receive array as the multibeam.

  • Underhull appendage is slightly more than that

    on a T-AGS 60 ship.

  • This gondola arrangement also includes all of the

    other transducers mounted on the existing T-AGS 60

  • This is one of several installation methods that N61

    is considering for the EM121A replacement.


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