Mobile Magnetic and Multi-Influence Range Advanced Degaussing and Ranging System

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1 Mobile Magnetic and Multi-Influence Range Advanced Degaussing and Ranging System

2 General Introduction For many years SAM Electronics has made substantial contributions to Naval Magnetic Ranging and Treatment Technologies and has proven its experience and know-how in the implementation of large-scale national and international range projects. Until recently, Multi Purpose Ranges at fixed locations for ranging of various classes of naval vessels were state-of-the-art. The implementation of these ranges required considerable investments, especially in infrastructure measures and installation. Current trends in magnetic ranging, however, are aimed at setting up cost - efficient mobile range facilities. For many navies, changes in naval policy necessitate out of area deployment of naval forces and their support by magnetic ranging prior to missions, even inremote places. In addition, on account of shrinking budgets, navies require the possibility to use range equipment at various locations at home. Thanks to advanced sensors and versatile application software for data evaluation and analysis, mobile ranges combining high performance with reduced expenditure for equipment and infrastructure are now feasable. SAM Electronics has responded to these trends by introducing its mobile magnetic range system Mora Sym and mobile multi influence range system Mira Sym. Mora sym allows the acquisitation of magnetic field data from all types of naval vessels. Mira Sym extents the measuring potential by using multiinfluence probes for obtaining acoustic, electric pressure and environmential data. System Features The ranging systems Mora Sym and Mira Sym are characterized by the following features: n Containerization of the entire range equipment in two 20 ft standard containers capable of sea, air and land transport n Full independence of the system from shore support n Quick mobilization and demobilisation of the range without the assistance of divers n Active triple probes with front end electronic for magnetic measurements and sensors for electric field, acoustic, pressure as well as seismic measurements. Data transmission by an optical fiber glass transmission path via active underwater interface unit n Probe array suitable for ranging of all classes of naval vessels requiring a minimum of manoeuvering space n Tracking of the vessel, undergoing ranging by Differential Global Positioning System (DGPS) n Extensive system software for data processing and analysis of ranging data 2

3 Equipment Diagram Containers - Power & Storage container - Measuring container Onshore Equipment Evaluation Equipment - Computer systems - Software - DGPS Tracking systems Underwater Facilities - Underwater electronic (UWE) - Underwater cables - Bouys and ropes MORA SYM <- OR-> MIRA SYM Offhore Equipment Probe Array - Magnetic sensor - Pressure sensor Probe Array - Magnetic sensor - Acoustic sensors (high/low) - Electronic sensor - Pressure sensor Additional Probe - Seismic sensor - Water temperature sensor - Waterflow sensor - Water conductivity sensor - Salininty sensor ILS - Documentation - Training 3

Container All facilities needed for carrying out ranging operations are contained in a 20 ft measuring container, equipped with two PC-workstations, which serves the dual purpose of providing working

4 Container All facilities needed for carrying out ranging operations are contained in a 20 ft measuring container, equipped with two PC-workstations, which serves the dual purpose of providing working space during operation of the range and of storage space when not in use or during transports. View into the storage compartement A second 20 ft. container accommodates the diesel generating set and associated equipment and provides storage space for the offshore equipment and auxiliary facilities required for installation of the wet end components. Due to it s modular design and full containerisation both systems can be easily transported by all conventional means of transportation. In addition to an installation onshore the construction of the container has been ruggedised to suit their deployment on board of naval vessels, giving both systems also a fully seaborne option. The set up of the range facilities is feasible at virtually any coastal place where accessibility, water depth, manoeuvring space and prevailing environmental conditions allow its deployment. Depending on the working conditions the mobilisation for both systems takes a trained skilled crew within 2 working days, while demobilisation can be accomplished in 1 working day. Measuring Container The measuring container is equipped with two workstations for processing, evaluation and presentation of data obtained from the offshore probe system and from tracking of the vessel undergoing ranging. During ranging operations, the measuring container is intended for manned deployment with the workstations serving as redundant Man-Machine-Interface for control of the entire ranging procedure. Fixed windows are provided for the measuring container to allow the visual observation of the ranging procedure. 4

Power and Storage Container The power and storage container supports the autonomous operation of the mobile range during its deployment, when access to public power supply is not available.

5 Power and Storage Container The power and storage container supports the autonomous operation of the mobile range during its deployment, when access to public power supply is not available. View into the DG compartement The power and storage container is divided into two separate compartments: DG-Set Compartment The DG-set compartment is an unmanned operating room. It is soundproof and accommodates all equipment and facilities required for generation and distribution of 25 kva of electrical power needed to operate the range facilities. A connection box is provided for alternative power supply from the public mains or from the ships mains if the system is employed on board of a naval vessel and for power distribution to the measuring container. Storage Compartment For transport and storage periods the following equipment is stowed in the storage compartment. Brackets, clamps, holders etc. are provided for safe stowage during transports.with the exception of the partition wall dividing the power and storage container into two independent compartments, the sound proof enclosure of the DGset compartment and the large watertight access door to the storage compartment, both containers are of identical mechanical design. 5

6 Advanced Degaussing and Ranging System 1. Active Magnetic Triple Probe 2. Offshore Data Acquisition Unit 3. Optical Data Transmission Path 4. Measuring Container 5. Energy / storage Container 6. Differential GPS 7. Data Processing System

Data Processing, Tracking and Communication Systems Power Container Diesel Engine GPS Clock G 3~ Monitor PWR PWR The data processing system accepts the output signals from the probes as well as data

7 Data Processing, Tracking and Communication Systems Power Container Diesel Engine GPS Clock G 3~ Monitor PWR PWR The data processing system accepts the output signals from the probes as well as data derived from the global positioning system. Under consideration of the vessel s track during overruns, the raw data supplied by the probes are converted into measuring data referred to the vessel s coordinate system. DGPS Telemetry IEEE 1394 OPTO Telemetry Data Processing Computer Monitor Course Piot Computer Colour Laser Printer Monochrom Laser Printer In addition the system performs control and monitoring functions during the measuring activity. Two workstation terminals serve as the Man Machine Interface of the system. Communication is effected by Menu Techniques. The design of the software allows utmost support to the operator by system intelligence of the data processing system. DGPS Telemetry Notebook Multi Influence Probes 1 to 5 UWE Auxiliary Probes Several task sequences can be selected by the operator to enable the various functions such as data inputs, measurements, data corrections as well as presentation procedures. The particular facilities of data processing are as follows: n Operator inputs for the definition of measuring parameters comprising the data of the individual ranging task such as ship s data, kind of measurement, environmental conditions etc. n Acquisition of measurement data from the probe array via the Underwater Electronic Unit and the fibre optic transmission path n Data from the DGPS-system are acquired for plotting of the actual course track during the overrun 8

Based on the aforementioned data processing features a typical ranging procedure of a vessel will be carried out in the following manner: n Start of the ranging operation with the necessary operator

n Overrun of the vessel in the desired directions with following subsequent functions: - Acquisition of measurement data from the multi-influence sensors - Support of the helmsman during the overrun

8 Based on the aforementioned data processing features a typical ranging procedure of a vessel will be carried out in the following manner: n Start of the ranging operation with the necessary operator inputs for ship s data, kind of measurement, environmental conditions etc. n Overrun of the vessel in the desired directions with following subsequent functions: - Acquisition of measurement data from the multi-influence sensors - Support of the helmsman during the overrun procedure by display of the actual course track obtained from the DGPS-system on the lap top PC on board of the vessel - Transmission of course data from the DGPSsystem to the shore station - Generation of a realtime plot of selected measuring data and course data by data correlation n Data correction processing - Generation of the magnetic model of the ship undergoing ranging by utilizing the acquired ranging data - Data presentation in form of line diagrams, isomagnetic lines, 3-D displays, frequency spectra and waterfall diagrams according to operator selection 3-D magnetic signature plot By combining data from two or more overruns magnetic calibration of the ship is performed, comprising: n Calculation of the induced and permanent (IM/PM) magnetizations of the vessel, if desired by the operator n Calculation of setting proposals for the shipboard degaussing system, if desired by the operator Example of line diagram 9

Functional Description of the DGPS-Tracking System The evaluation of the field data obtained from the probes during overruns of the probe array, necessitates a correlation with the vessels geographic

9 Functional Description of the DGPS-Tracking System The evaluation of the field data obtained from the probes during overruns of the probe array, necessitates a correlation with the vessels geographic position and its heading, which needs to be established with high precision. Track pilot of intercardinal overrun These navigation data of the vessel are established with the aid of two DGPS receivers which are temporarily installed on board during ranging. Both receivers (one each in the forward and aft section of the vessel) are installed at a predetermined distance on the ship s centerline. This allows to determine the geographic position of the vessel and to calculate its heading. The information of the two receivers are interconnected. The complete data set is provided to the track display computer on board (note book), which is assigned as helmsman s support and serves as the ships DGPS data processing system. The course track data is also provided by radio link to the workstation onshore as on line information. Simultaneously a land based DGPS reference receiver provides precise position data which serve as correction data for the ship s receivers. The correction data are transmitted via data link to the ship s receiver modem and further to the DGPS data processing system. Since the land based reference receiver is placed on an exactly determined geographical reference point, the position error of the system (atmospherical conditions, time error etc.) can be exactly calculated for the area of deployment of the facility. The error data are converted into the respective correction data and serve for the error compensation at the ship s DGPS receivers. 10

Underwater Electronic (UWE) The Underwater Electronic Unit serves as the link between the individual probes and the shore based data processing facilities (PC).

paths. The half-duplex data transmission between the measuring container and the UWE is effected via these two fibre optic links with one link for each direction of the data flow.

The UWE transforms the analogue probe signals into digital data and converts it into an optical signal capable of being transmitted via the fibre optic transmission path.

10 Underwater Electronic (UWE) The Underwater Electronic Unit serves as the link between the individual probes and the shore based data processing facilities (PC). The UWE is connected to the measuring container by 2000 m of hybrid underwater cable which besides copper cores for power transmission and pinger activation also carries two fibreoptic transmission paths. The half-duplex data transmission between the measuring container and the UWE is effected via these two fibre optic links with one link for each direction of the data flow. The individual probe carriers are connected to the UWE by conventional multi-core copper cable and underwater plugs. The UWE transforms the analogue probe signals into digital data and converts it into an optical signal capable of being transmitted via the fibre optic transmission path. The transmission of data from and to the UWE is carried out by respective optical transmitter / receiver-units, which are part of the UWE and the shore based interface unit. The control of the entire data acquisition and data transmission routines is effected from the Data Processing PC which controls the functions of: n Initialization n Calibration n Data acquisition n Data transfer Command signals are generated as a serial data word by the Data Processing PC converted into an optical signal and transmitted to the UWE via one of fibre optic data links where re-conversion into an electrical signal is effected. Upon start at the command data acquisition a sequential measuring routine is initiated. The output of probes are cyclically acquired, stored in the data acquisition module and upon receipt of the command transfer data transmitted to the Data Processing PC. 11

Probe Array The probe carriers consist of a sensor platform for the probes, a protection cage and a tripod at the bottom to adapt the probe carrier to uneven or soft ground conditions.

In order to enhance the installation capability of the probes, the cable connection is from below, while the rope used for lowering / hoisting of the probe during mobilization / demobilization is

11 Probe Array The probe carriers consist of a sensor platform for the probes, a protection cage and a tripod at the bottom to adapt the probe carrier to uneven or soft ground conditions. The tripod shape of the probe carriers ensures a firm stand on the seabed even under adverse environmental conditions such as strong currents or silting. In order to enhance the installation capability of the probes, the cable connection is from below, while the rope used for lowering / hoisting of the probe during mobilization / demobilization is attached to the head of the probe carrier. The probes and the tripod probe carriers represent a ready to deploy assembly. Probe carrier for system Mora Sym comprises: n One probe for magnetic signals Probe carrier of system Mira Sym for multiinfluence probes comprises: n One probe for magnetic signals n Two probes for acoustic signals n One probe for electric signals n One probe for pressure signals n One pinger transmitter Printed in Germany Technical alterations reserved SAM Electronics GmbH DS /2010 This probe carriers are made of seawater resistant plastic material. Probe carrier for Mira Sym Each probe carrier comprises a watertight interface box for the connection of the internal probes cabling. The interface box of each carrier is connected to the Underwater Electronics Unit (UWE) by seawater resistant probe cable. Each cable is fitted with special underwater plugs. Additional probe carrier with auxilary sensors for Mira Sym. SAM Electronics GmbH Drives and Special Systems Behringstrasse Hamburg. Germany Phone: +49 (0) Fax +49 (0) DSS@sam-electronics.de

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