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Memorandum Reports

Report that covers interim results during the course of a project. Note: Unless linked to the full text, reports are only available to NATO member nations from designated distribution centres.

Documents

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Multiple vessel routing in the GO-DSS: a flow network formulation Multiple vessel routing in the GO-DSS: a flow network formulation

Date added: 02/22/2016
Date modified: 02/22/2016
Filesize: Unknown

Multiple vessel routing in the GO-DSS: a flow network formulation. Bourque, François-Alex. CMRE-MR-2016-002. February 2016.

This contribution proposes to improve the Goal Oriented Decision Support System (GO-DSS) in light of previous results where a simpler vessel routing algorithm was shown to perform as well as the evolutionary algorithm implemented in the Optimal Asset Allocator (OAA) at a fraction of the computational cost. The prototyping builds on this work by implementing in the statistical analysis software R an alternative vessel routing algorithm using a minimum-cost flow network formulation of the problem. Planning is done at the tactical level, with a possible extension to operational planning via a rolling planning horizon left as a future contribution. As for the OAA, a set of time-ordered risk maps fusing various sources of information is the main input. Besides providing a net improvement in performance, the prototyped algorithm is also faster. Planning, however, is only possible for a fleet of homogeneous assets.

Experimental results on submarine detectability with continuous active sonar Experimental results on submarine detectability with continuous active sonar

Date added: 02/22/2016
Date modified: 02/22/2016
Filesize: Unknown

Experimental results on submarine detectability with continuous active sonar. Murphy, Stefan M. ; LePage, Kevin D. CMRE-MR-2015-004. April 2015.

Continuous active sonar (CAS) experimentation was conducted with an Italian diesel-electric submarine during the COLLAB-NGAS14 sea atrial. This report presents preliminary results and briefly describes the CAS-related components of the trial, including several issues encountered. A small subset of CAS data from one of CMRE’s AUVs was selected for full-band and sub-band processing. Analysis of this data subset resulted in a preliminary comparison of detection performance for various processing parameters. This report will be a useful guide for future analysis of CAS data collected during COLLAB-NGAS14.

NATO Coalition Warrior Interoperability eXploration, eXperimentation, eXamination, eXercise (CWIX) 2015 exercise plan NATO Coalition Warrior Interoperability eXploration, eXperimentation, eXamination, eXercise (CWIX) 2015 exercise plan

Date added: 02/17/2016
Date modified: 02/17/2016
Filesize: Unknown

NATO Coalition Warrior Interoperability eXploration, eXperimentation, eXamination, eXercise (CWIX) 2015 exercise plan. Vicen Bueno, Raul; Strode, Christopher; Oddone, Manlio; Bourque, François-Alex; Berni, Alessandro; Cignoni, Alessandro; Merani, Diego; Cimino, Giampaolo; Soto, Jose; Fiala, Michal; Millefiori, Leonardo; Arcieri, Gianfranco; Cecchi, Daniele; Grasso, Raffaele. CMRE-MR-2016-001. February 2016.

This document contains a description of the exercise plan prepared by the CMRE authors to participate in the NATO Coalition Warrior Interoperability eXploration, eXperimentation, eXamination, eXercise (CWIX) 2015. Three different programmes of CMRE participates in CWIX 2015: EKOE - Environmental Knowledge and Operational Effectiveness, MSEC - Maritime Security, and CASW - Collaborative AntiSubmarine Warfare. CMRE prepared the participation in the major NATO interoperability exercise CWIX 2015 based on the resources allocated in the following ACT-funded projects: SAC000509 EKOE/DUOE (Decisions in Uncertain Ocean Environments), SAC000508 EKOE/UUB (Understanding the Underwater Battlespace), SAC000510 MSEC/DKOE (Data Knowledge and Operational Effectiveness), and SAC000503 CASW/DS (Decision Support). CMRE brings six capabilities to the NATO Exercise CWIX 2015, demonstrating a large variety of scientific products that could turn into operational: EKOE/DUOE - 2015-NATO - AssetPlanning -, EKOE/DUOE -2015-NATO - EnvAs - (Environmental Assessment), EKOE/UUB -2015-NATO - OCdata- (Oceanographic Data and Forecast), CASW/DS ?2015-NATO - MSTPA - (Multistatic Tactical Planning Aid), MSEC/DKOE -2015-NATO - TREAD- (Traffic Route Extraction and Anomaly Detection), and MSEC/DKOE -2015-NATO - FaaS- (Fusion as a Service). This exercise plan first provides the internal submission and approval process. Second, it gives a background of the CWIX exercise to the readers, as well as the objectives and challenges set for this exercise participation. Third, it provides an overview on the way to operate in CWIX, focusing on physical locations and partners. Fourth, it describes the preparation of the experiment, focusing on the plan of the tasks and the risk assessment. Fifth, it provides a comprehensive list of equipment requirements for each capability so that it can be executed at the required security level. Sixth, it describes the team required to participate and the roles and responsibilities of each member of the team. Seventh, the contact information of the exercise lead and capability leads is reported for future contact and further information requests. Finally, a comprehensive description of each capability is provided in annexes.

Civilian Monitoring Network (CMN) high level report Civilian Monitoring Network (CMN) high level report

Date added: 02/05/2016
Date modified: 02/05/2016
Filesize: Unknown

Civilian Monitoring Network (CMN) high level report. Collins, Michael. CMRE-MR-2015-018. January 2016.

The advent of low cost hydrophones and the electronics necessary to record, process, and disseminate recordings has led to an increase in the amount of recording equipment deployed in the ocean for nonmilitary purposes. Installations of recording equipment used by civilians are referred to as ?Civilian Monitoring Networks? (CMNs). A CMN may inadvertently record the acoustic signature of NATO submarines, thus compromising their security. To quantify this risk, a computer pro-gram called the Passive Acoustic Modelling Tool (PAMT) is developed to estimate CMN detection range. PAMT uses the Artemis sonar performance model to estimate transmission loss in the vicinity of CMN sensors. Artemis accounts for the effects of bathymetry, sound speed profile, surface and bottom scattering, and bottom conditions. PAMT combines the transmission loss calculation with knowledge of CMN sensor characteristics and ambient noise measurements. The CMN sensor characteristics modelled by PAMT are self-noise and array geometry. PAMT is used to generate maps showing the detection zones for a CMN sensor at a given radiated noise level. The effect of CMN array geometry, frequency, submarine depth, sound speed profile, and ambient noise level is studied.

Taxonomy of civilian monitoring networks Taxonomy of civilian monitoring networks

Date added: 02/05/2016
Date modified: 02/05/2016
Filesize: Unknown

Taxonomy of civilian monitoring networks. Collins, Michael. CMRE-MR-2015-019. January 2016.

The advent of low cost hydrophones and the electronics necessary to record, pro-cess, and disseminate recordings has led to an increase in the amount of recording equipment deployed in the ocean for nonmilitary purposes. Installations of recording equipment used by civilians are referred to as ?Civilian Monitoring Networks? (CMNs). A CMN may inadvertently record the acoustic signature of NATO submarines, thus compromising their security. To assess the threat, a taxonomy is created. It categorizes CMNs by their sensor characteristics, data handling methods, and purpose. The taxonomy of sensor characteristics is designed to allow quick estimation of CMN detection range when combined with an appropriate modelling tool.

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