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T-AGS-60

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

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

  2. T-AGS-60

  3. 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

  4. RECEIVER RACK

  5. TRANSMITTER RACK

  6. OPERATOR CONSOLE

  7. DPC MONITORS

  8. EM121A Projector Installation

  9. EM-121APROJECTORS

  10. INSTALLATION

  11. 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

  12. 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

  13. INSTALLATION OF BILGE KEELS

  14. BUBBLE SWEEPDOWNFENCES

  15. 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

  16. 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.

  17. 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.

  18. MAINTENANCE - ADCP TRANSDUCER

  19. MAINTENANCE / DOMES

  20. MAINTENANCE EM121 RECEIVE ARRAY

  21. REFURBISHEDSONAR DOMES

  22. EM-1002/1000 TRANSDUCER

  23. MAINTENANCE

  24. 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

  25. FUTURE PLANS “SONAR REPLACEMENTS” EM121A STARTING FY06 SUB-BOTTOM PROFILER FY06 EM1002 FY08

  26. 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

  27. 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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