1 NAVAL OCEANOGRAPHIC OFFICE SYSTEMS ENGINEERING DIVISION N612 ENGINEERING ROLE IN NAVOCEANO SHIP’S ENVIRONMENT Procurement of New Systems. Configuration

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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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T-AGS-60

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MULTIBEAM SONAR

PROCUREMENT AND INTEGRATION

ISSUES

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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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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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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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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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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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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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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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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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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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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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Documents

1 NAVAL OCEANOGRAPHIC OFFICE SYSTEMS ENGINEERING DIVISION N612 ENGINEERING ROLE IN NAVOCEANO SHIP’S ENVIRONMENT Procurement of New Systems. Configuration