Post on 20-Jan-2016
transcript
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
N612
ENGINEERING ROLEIN NAVOCEANO
SHIP’S ENVIRONMENT
Procurement of New Systems.
Configuration Management.
Installation
Testing and Final Acceptance
Ship Modifications (Re-designs)
Training
Maintenance
New Technology
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
N612
T-AGS-60
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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MULTIBEAM SONAR
PROCUREMENT AND INTEGRATION
ISSUES
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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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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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
N612
Identify Requirements
Define what it is the system will be expected to do
Market evaluation to determine the capabilities ofavailable systems
Determine what you can afford to spend
Determine procurement strategy
Prepare concise specifications to get equipment procured,installed and operational
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
N612
Define What It Is The System Will Be ExpectedTo Do
What is the final output product?
What depth range/swath width is expected?
What environmental conditions will the systemoperate under?
What kind of vessel will the system be used on?
Where will each of the required components of thesystem come from?
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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Market Evaluation To DetermineCapabilities Of Available Systems
Vendor published and internet literature
Conferences, User Groups and publishedProceedings
Attend manufacturer demonstrations
Trade Shows
Visit/participate in other user’s surveys
Vendor Operator/Maintenance Manuals
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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Determine What You Can Afford ToSpend
Initial Hardware and Software Procurement Cost
Installation Cost
Ongoing Operation and Maintenance Cost
Training Cost
Lost Time and Resources During Installation, Testingand Training
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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Determine Procurement/IntegrationStrategy
Purchase complete integrated system from one vendor
Purchase individual components separately
Use subsytems that you already own
Use an integration contractor
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
N612
Prepare Concise Specifications To Get EquipmentProcured, Installed and Operational
Purchase specifications/contracts that includemeasurable acceptance criteria and clearly defined areasof responsibility
Installation Specifications
Procedures and specifications for system alignmentsurvey
Test Procedures
Technical Support
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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Specifications/Contracts
Specification/contract should cover all subsystems, i.e., motionsensor, data collection system, sound velocity profiler, etc.
Where existing subsystems will be used, specification/contractshould fully describe the hardware and software interface, andclearly state who is responsible for integration
For issues such as depth and swath capability, systemaccuracy, etc., the specification/contract should discuss themethod to be used for testing as well as the acceptance criteria
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CONFIGURATIONMANAGEMENT
TRANSCEIVERELECTRONICS
TRANSDUCER ARRAYS
DATACOLLECTIONCOMPUTER
VESSELHEADING
VESSELATTITUDE
VESSELPOSITION SOUND
VELOCITYPROFILER
SURFACESOUNDVELOCIMETER
DATAPROCESSINGCOMPUTER
INTEGR ATED NAVIGATION SYSTE M
OPERATORINTERFACE
BRIDGEINTERFACE
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Installation
System installation usually involves several parties - thecustomer, the system vendor(s), a shipyard, analignment surveyor, etc. - it is critical that each partyunderstand its own role as well as that of the others
Define who will design, provide and install eachcomponent of the system
Schedule enough time for each party to finish what theyare responsible for
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Installation
Underhull - who will design/provide/install transducermounting brackets, hydrodynamic fairing, water-tightcable fittings, etc., also identify any special paintrequirements
Dryside - who will design/provide/install equipmentracks and foundations, interconnecting cables andconnectors
Environmental Issues - temperature and humiditycontrol, power quality, shock and vibration isolation
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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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INSTALLATION
Alignment Survey - angular and linear offsets betweenthe transducers, motion sensor, navigation antenna, etc.must be within tolerances specified by manufacturer andprecisely measured
Establish and consistently use a repeatable ship’s frameof reference for all offset measurements
Specify required accuracy for each measurement andrequire proof that measurements are within specifiedvalues
Closely coordinate shipyard and alignment survey workto avoid conflicts
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Installation Specifications
Multibeam systems are complex and expensive - includetechnical support in budgets, schedules, etc.
Vendor technical support during equipment installation,check-out and initial power-up
Vendor technical support for sea-trials and initialcalibration
Operator and maintenance training
Hardware and software maintenance
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EM121A Projector Installation
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EM-121APROJECTORS
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INSTALLATION
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TESTING
CONDUCT PERIODIC ACOUSTIC TESTING TO MAINTAIN HIGH LEVELS OF PERFORMANCE FOR
ACOUSTIC SYSTEMS
- SEVERE BUBBLE SWEEP DOWN
- FAILED INITIAL AT-SEA TEST VERYHIGH FLOW NOISE
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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
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INSTALLATION OF BILGE KEELS
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N612 BUBBLE SWEEPDOWNFENCES
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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.
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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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EM121 RECEIVE ARRAY
•MAINTENANCE
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REFURBISHEDSONAR DOMES
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EM-1002/1000 TRANSDUCER
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MAINTENANCE
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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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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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FUTURE PLANS“SONAR REPLACEMENTS”
• EM121A STARTING FY06• SUB-BOTTOM PROFILER FY06• EM1002 FY08
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NAVAL OCEANOGRAPHIC OFFICESYSTEMS ENGINEERING DIVISION
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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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