Bala Naga Jyothi Vandavasi, Umapathy Arunachalam, Doss Prakash Vittal, Ramesh Raju, Vedachalam Narayanaswamy, V. Arumugam, R. Sethuraman, Ananda Ramadass Gidugu
Abstract Subsea homing and docking systems are used for increasing the spatiotemporal capabilities of autonomous underwater vehicles (AUVs) involved in long endurance scientific, survey, and surveillance missions. They offer necessary guidance for the AUV, and maneuver into the dock, considering the vehicle attitude and the dynamic response capabilities. Short-range homing is critical for successful docking as carrying outgross course and heading corrections is difficult when the AUV is closer to the dock. The article describes the development of an artificial intelligence (AI)-enabled short-range AUV electro-magnetic homing guidance system (EMHGS) based on differential magnetometry principle. System engineering is carried out with the aid of electromagnetic Finite Element Analysis software; supervised and unsupervised machine learning algorithms are implemented for determining the range and heading correction in real time. The proposed algorithms aid the reliable and accurate homing operation in an unknown dynamic environment, and the algorithm is very easily implementable and independent of AUV configuration and payloads. The EMHGS with an AI-enabled MagHomer AUV is demonstrated for autonomous intelligent homing over a range of 7 m.
{"title":"AI‐ML-Enabled Electromagnetic Homing Guidance System for Scientific Autonomous Underwater Vehicles","authors":"Bala Naga Jyothi Vandavasi, Umapathy Arunachalam, Doss Prakash Vittal, Ramesh Raju, Vedachalam Narayanaswamy, V. Arumugam, R. Sethuraman, Ananda Ramadass Gidugu","doi":"10.4031/mtsj.57.1.2","DOIUrl":"https://doi.org/10.4031/mtsj.57.1.2","url":null,"abstract":"Abstract Subsea homing and docking systems are used for increasing the spatiotemporal capabilities of autonomous underwater vehicles (AUVs) involved in long endurance scientific, survey, and surveillance missions. They offer necessary guidance for the AUV, and maneuver into\u0000 the dock, considering the vehicle attitude and the dynamic response capabilities. Short-range homing is critical for successful docking as carrying outgross course and heading corrections is difficult when the AUV is closer to the dock. The article describes the development of an artificial\u0000 intelligence (AI)-enabled short-range AUV electro-magnetic homing guidance system (EMHGS) based on differential magnetometry principle. System engineering is carried out with the aid of electromagnetic Finite Element Analysis software; supervised and unsupervised machine learning algorithms\u0000 are implemented for determining the range and heading correction in real time. The proposed algorithms aid the reliable and accurate homing operation in an unknown dynamic environment, and the algorithm is very easily implementable and independent of AUV configuration and payloads. The EMHGS\u0000 with an AI-enabled MagHomer AUV is demonstrated for autonomous intelligent homing over a range of 7 m.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41414538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guan Guan, Hongling Liao, Qu Yang, Weidi Sun, Yuzhou Sun
Abstract To effectively improve the precision matching technique of measurement point set and design point set for hull blocks, an accurate point set matching method for hull blocks with engineering constraints (verticality, levelness, symmetry, flatness, etc.) and elimination error points is presented. It is divided into initial matching and refine matching. In initial matching, the improved Random Sample Consensus algorithm is proposed to eliminate error points rapidly and accurately; the improved Coherent Point Drift algorithm is proposed to obtain more accurate initial matching. In refine matching, the Analytic Hierarchy Process is used to obtain each weight of engineering constraints automatically, and the weight vector is introduced into the multi-optimization objective function to achieve the more reasonable matching results. The results proved that this method can rapidly and automatically eliminate error points, and get more accurate and reasonable results meeting engineering constraints. It can provide the basis for the subsequent assembly of hull blocks.
{"title":"An Accurate Point Set Matching Method for Hull Blocks With Engineering Constraints","authors":"Guan Guan, Hongling Liao, Qu Yang, Weidi Sun, Yuzhou Sun","doi":"10.4031/mtsj.57.1.3","DOIUrl":"https://doi.org/10.4031/mtsj.57.1.3","url":null,"abstract":"Abstract To effectively improve the precision matching technique of measurement point set and design point set for hull blocks, an accurate point set matching method for hull blocks with engineering constraints (verticality, levelness, symmetry, flatness, etc.) and elimination\u0000 error points is presented. It is divided into initial matching and refine matching. In initial matching, the improved Random Sample Consensus algorithm is proposed to eliminate error points rapidly and accurately; the improved Coherent Point Drift algorithm is proposed to obtain more accurate\u0000 initial matching. In refine matching, the Analytic Hierarchy Process is used to obtain each weight of engineering constraints automatically, and the weight vector is introduced into the multi-optimization objective function to achieve the more reasonable matching results. The results proved\u0000 that this method can rapidly and automatically eliminate error points, and get more accurate and reasonable results meeting engineering constraints. It can provide the basis for the subsequent assembly of hull blocks.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41564462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Jamieson, P. Lahey, R. MacCallum, Stuart Buckle, T. Macdonald, Victor Vescovo
Abstract In 2019, the Deep Submergence Support Vessel Pressure Drop embarked on the third leg of the Five Deeps Expedition. Over the course of 10 days, the full ocean depth submersible Deep Submergence Vehicle Limiting Factor made a record five dives to the bottom of the Mariana Trench: four to the Challenger Deep, one to the Sirena Deep. The submersible was supported by three scientific landers, one of which became stuck on the seafloor at 10,925 m depth. Here we describe how, during the third dive of the campaign, the expedition utilized the submersible to rescue this lost asset from full ocean depth. The expedition was not only significant for its operational jump from single full ocean depth dives to multiple dives in a short space of time, but demonstrated that assets lost in the deepest 45% of the oceans are no longer irretrievable.
{"title":"Recovery of a Lost Subsea Asset at Full Ocean Depth in the Mariana Trench (10,925 m ± 4) Using a Crewed Submersible","authors":"A. Jamieson, P. Lahey, R. MacCallum, Stuart Buckle, T. Macdonald, Victor Vescovo","doi":"10.4031/mtsj.57.1.4","DOIUrl":"https://doi.org/10.4031/mtsj.57.1.4","url":null,"abstract":"Abstract In 2019, the Deep Submergence Support Vessel Pressure Drop embarked on the third leg of the Five Deeps Expedition. Over the course of 10 days, the full ocean depth submersible Deep Submergence Vehicle Limiting Factor made a record five dives to the\u0000 bottom of the Mariana Trench: four to the Challenger Deep, one to the Sirena Deep. The submersible was supported by three scientific landers, one of which became stuck on the seafloor at 10,925 m depth. Here we describe how, during the third dive of the campaign, the expedition utilized the\u0000 submersible to rescue this lost asset from full ocean depth. The expedition was not only significant for its operational jump from single full ocean depth dives to multiple dives in a short space of time, but demonstrated that assets lost in the deepest 45% of the oceans are no longer irretrievable.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44657670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Zhou, Xiaoqin Peng, Haipei Zhu, Xueyu Ren, P. Lin, Kaichuang Wang, Haonan Li, Zhonghui Zhou, Jia-wang Chen, Jun Li, Xuehua Chen, Guomin Cao, Xuyun Gao
Abstract The submarine oil pipeline has many advantages, such as large oil transportation capacity, and being fast and economical. However, long-term laid submarine oil pipelines are affected by reciprocating load of water flow, subsidence caused by soil liquefaction, ship anchorage operation, etc. In severe cases, it causes overall distortion of a small section of the submarine pipeline, profoundly affecting the safety of the submarine pipeline, which is a significant safety hazard for the health of the marine environment and potentially impacting social and economic benefits. Taking the Cezi-Zhenhai submarine pipeline in the sea area between Ningbo and Zhoushan as an example, many deformation defects in the pipeline have been found through internal inspection, and there is a trend of further deterioration. However, the existing external detection of submarine pipeline deformation can only collect limited data through mechanical dots for rough inversion. This does not meet the accuracy requirements of repairing existing submarine pipeline clamps. Therefore, we propose a real-time visualization surveying and mapping system for the submarine pipeline based on a 3-D laser and a separately designed electronic control system. Our research team performed actual mapping work for the Cezi-Zhenhai submarine pipeline and achieved an excellent mapping control effect. A steady monitoring image and good control effect of moving parts are obtained, and the data obtained by 3-D laser processing perfectly represent the actual state of the submarine pipeline. Predictably, the large-scale application of this system will provide a solid technical guarantee for the health of submarine pipelines.
{"title":"Research on 3-D Precise Mapping System for Deformation Defects of Submarine Pipeline","authors":"P. Zhou, Xiaoqin Peng, Haipei Zhu, Xueyu Ren, P. Lin, Kaichuang Wang, Haonan Li, Zhonghui Zhou, Jia-wang Chen, Jun Li, Xuehua Chen, Guomin Cao, Xuyun Gao","doi":"10.4031/mtsj.57.1.6","DOIUrl":"https://doi.org/10.4031/mtsj.57.1.6","url":null,"abstract":"Abstract The submarine oil pipeline has many advantages, such as large oil transportation capacity, and being fast and economical. However, long-term laid submarine oil pipelines are affected by reciprocating load of water flow, subsidence caused by soil liquefaction, ship\u0000 anchorage operation, etc. In severe cases, it causes overall distortion of a small section of the submarine pipeline, profoundly affecting the safety of the submarine pipeline, which is a significant safety hazard for the health of the marine environment and potentially impacting social and\u0000 economic benefits. Taking the Cezi-Zhenhai submarine pipeline in the sea area between Ningbo and Zhoushan as an example, many deformation defects in the pipeline have been found through internal inspection, and there is a trend of further deterioration. However, the existing external detection\u0000 of submarine pipeline deformation can only collect limited data through mechanical dots for rough inversion. This does not meet the accuracy requirements of repairing existing submarine pipeline clamps. Therefore, we propose a real-time visualization surveying and mapping system for the submarine\u0000 pipeline based on a 3-D laser and a separately designed electronic control system. Our research team performed actual mapping work for the Cezi-Zhenhai submarine pipeline and achieved an excellent mapping control effect. A steady monitoring image and good control effect of moving parts are\u0000 obtained, and the data obtained by 3-D laser processing perfectly represent the actual state of the submarine pipeline. Predictably, the large-scale application of this system will provide a solid technical guarantee for the health of submarine pipelines.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44336481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hainan Xia, Xiangnan Wang, Jianjun Shi, Ning Jia, Yunqi Duan
Abstract In the demonstration and validation of tidal energy converters, analyzing the characteristics of tidal current energy resource in the demonstration sea area of tidal energy converters is a key step to evaluate the economic performance of the tested tidal energy converter. Based on analyzing the research status and the evaluation demands of economic performance indicators of tidal energy converters at home and abroad, the analysis method of tidal current energy resource assessment and characterization was studied, a method for calculating the cumulative frequency of tidal current velocity was proposed, and it was applied in the processing and analyzing the tidal current field test data. Moreover, using the analysis results of tidal current energy resource characteristics, the annual energy production of the tested tidal energy converter was calculated. The results show that the analysis method studied in this technical note can analyze the tidal current energy resource characteristics comprehensively and objectively, and the proposed calculation method of cumulative frequency can reflect the availability of the tidal energy converter in the demonstration sea area. The research results not only provide a reference for analyzing the tidal current energy resource characteristics in the demonstration sea area of tidal energy converters, but also provide a reference for calculating the annual energy production of tidal energy converters.
{"title":"Research on Analysis Method of Tidal Current Energy Resource Characteristics","authors":"Hainan Xia, Xiangnan Wang, Jianjun Shi, Ning Jia, Yunqi Duan","doi":"10.4031/mtsj.56.6.5","DOIUrl":"https://doi.org/10.4031/mtsj.56.6.5","url":null,"abstract":"Abstract In the demonstration and validation of tidal energy converters, analyzing the characteristics of tidal current energy resource in the demonstration sea area of tidal energy converters is a key step to evaluate the economic performance of the tested tidal energy converter.\u0000 Based on analyzing the research status and the evaluation demands of economic performance indicators of tidal energy converters at home and abroad, the analysis method of tidal current energy resource assessment and characterization was studied, a method for calculating the cumulative frequency\u0000 of tidal current velocity was proposed, and it was applied in the processing and analyzing the tidal current field test data. Moreover, using the analysis results of tidal current energy resource characteristics, the annual energy production of the tested tidal energy converter was calculated.\u0000 The results show that the analysis method studied in this technical note can analyze the tidal current energy resource characteristics comprehensively and objectively, and the proposed calculation method of cumulative frequency can reflect the availability of the tidal energy converter in\u0000 the demonstration sea area. The research results not only provide a reference for analyzing the tidal current energy resource characteristics in the demonstration sea area of tidal energy converters, but also provide a reference for calculating the annual energy production of tidal energy\u0000 converters.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49578658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Fiorentino, R. Heitsenrether, K. Kirk, W. Krug, E. Breuer, W. Hensley
Abstract The National Oceanic and Atmospheric Administration (NOAA) National Ocean Service Center for Operational Oceanographic Products and Services (CO-OPS) manages the National Current Observation Program (NCOP) and Physical Oceanographic Real-Time Systems (PORTS®). These programs provide tide and current predictions, as well as real-time current and meteorological information. Outdated current predictions, navigational support requirements, and incident response scenarios (e.g., oil spills, vessel accidents) have highlighted CO-OPS' need for a rapidly deployable system that provides near-surface current and meteorological observations. To address this, CO-OPS designed, developed, and tested a real-time system based on a surface buoy platform, hereinafter referred as CURrents BuoY (CURBY). This paper provides an overview of the system design, field test results, operational applications, and future plans.In 2018, CO-OPS completed the build, integration, and testing of the first prototype CURBY. A successful field test was completed during 2018 in the Chesapeake Bay, and the first operational deployment followed shortly on the Delaware River in 2019. Resulting measurements were used to improve tidal current predictions and to plan for a 2021 regional survey. Initial success with tidal current survey operations led to design enhancement and wider use. During 2020‐2021, CO-OPS partnered with the NOAA Office of Response and Restoration to build two new CURBYs to support emergency response applications in the Gulf of Mexico region. During 2022, two CURBY systems were deployed in the Columbia River, Oregon, to support additional NCOP operations. Future plans include establishing a long-term CURBY system for Kings Bay, Georgia, PORTS®.
{"title":"Recent Development and Field Test of CO-OPS' Real-Time, Shallow Water CURrents BuoY (CURBY)","authors":"L. Fiorentino, R. Heitsenrether, K. Kirk, W. Krug, E. Breuer, W. Hensley","doi":"10.4031/mtsj.56.6.1","DOIUrl":"https://doi.org/10.4031/mtsj.56.6.1","url":null,"abstract":"Abstract The National Oceanic and Atmospheric Administration (NOAA) National Ocean Service Center for Operational Oceanographic Products and Services (CO-OPS) manages the National Current Observation Program (NCOP) and Physical Oceanographic Real-Time Systems (PORTS®).\u0000 These programs provide tide and current predictions, as well as real-time current and meteorological information. Outdated current predictions, navigational support requirements, and incident response scenarios (e.g., oil spills, vessel accidents) have highlighted CO-OPS' need for a rapidly\u0000 deployable system that provides near-surface current and meteorological observations. To address this, CO-OPS designed, developed, and tested a real-time system based on a surface buoy platform, hereinafter referred as CURrents BuoY (CURBY). This paper provides an overview of the system design,\u0000 field test results, operational applications, and future plans.In 2018, CO-OPS completed the build, integration, and testing of the first prototype CURBY. A successful field test was completed during 2018 in the Chesapeake Bay, and the first operational deployment followed shortly on the\u0000 Delaware River in 2019. Resulting measurements were used to improve tidal current predictions and to plan for a 2021 regional survey. Initial success with tidal current survey operations led to design enhancement and wider use. During 2020‐2021, CO-OPS partnered with the NOAA Office\u0000 of Response and Restoration to build two new CURBYs to support emergency response applications in the Gulf of Mexico region. During 2022, two CURBY systems were deployed in the Columbia River, Oregon, to support additional NCOP operations. Future plans include establishing a long-term CURBY\u0000 system for Kings Bay, Georgia, PORTS®.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48178577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract With the intensification of the world's energy demand, clean and efficient marine energy has received more attention, and energy conversion devices are particularly important. As an important part of the oscillating wave energy conversion device, the hydrodynamic characteristics of cylindrical absorbers have a great impacton wave energy conversion efficiency. When cylindrical buoys with different bottom configurations heave under the action of waves, the oscillating motion and flow field become more complex. At present, potential flow theory is usually used to predict the motion response of cylindrical buoys in waves. Although the calculation speed is fast, there will be large errors due to the lack of consideration of the effect of fluid viscosity. To explore this error range, a three-dimensional numerical wave pool is established based on the viscous fluid theory and STARCCM+ software to study the response of buoy and wave coupling action considering the viscous effect. At the same time, based upon the potential flow theory, the analytical solution of the cylindrical buoy oscillating in waves is established. Combined with the computational fluid dynamics numerical simulation results, the oscillation laws of the buoys with different bottom configurations in waves with different periods are compared, and the effects of viscosity on the buoys' motion are also explored. According to the calculation results of floating buoy movement under viscous and nonviscous fluid, the statistical correction algorithmis adopted to obtain the viscous hydrodynamic correction algorithm of floating buoy movement based on the potential flow theory, and the feasibility is verified by viscous numerical simulation under other wave periods.
{"title":"Viscous Damping Performance Analysis and Prediction of Axisymmetric Cylindrical Oscillating Buoys With Different Geometrical Configurations","authors":"Xiaoguo Zhou, Chengyao Sun, Jianhua Wang, Wentian Zhang, Wanchao Zhang","doi":"10.4031/mtsj.56.6.7","DOIUrl":"https://doi.org/10.4031/mtsj.56.6.7","url":null,"abstract":"Abstract With the intensification of the world's energy demand, clean and efficient marine energy has received more attention, and energy conversion devices are particularly important. As an important part of the oscillating wave energy conversion device, the hydrodynamic\u0000 characteristics of cylindrical absorbers have a great impacton wave energy conversion efficiency. When cylindrical buoys with different bottom configurations heave under the action of waves, the oscillating motion and flow field become more complex. At present, potential flow theory is usually\u0000 used to predict the motion response of cylindrical buoys in waves. Although the calculation speed is fast, there will be large errors due to the lack of consideration of the effect of fluid viscosity. To explore this error range, a three-dimensional numerical wave pool is established based\u0000 on the viscous fluid theory and STARCCM+ software to study the response of buoy and wave coupling action considering the viscous effect. At the same time, based upon the potential flow theory, the analytical solution of the cylindrical buoy oscillating in waves is established. Combined with\u0000 the computational fluid dynamics numerical simulation results, the oscillation laws of the buoys with different bottom configurations in waves with different periods are compared, and the effects of viscosity on the buoys' motion are also explored. According to the calculation results of floating\u0000 buoy movement under viscous and nonviscous fluid, the statistical correction algorithmis adopted to obtain the viscous hydrodynamic correction algorithm of floating buoy movement based on the potential flow theory, and the feasibility is verified by viscous numerical simulation under other\u0000 wave periods.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70232427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Multiple mooring components have been developed at Woods Hole Oceanographic Institution (WHOI) that represent significant advancements in mooring technology. The Ocean Observatories Initiative (OOI) Coastal Surface Moorings are a unique coalescence of these elements into a robust and capable electromechanical mooring design. This paper describes innovative design elements in three key areas that are used operationally on OOI moorings: (1) components at the interface between buoy base and mooring riser, (2) electro-mechanical mooring riser components, and (3) an integrated seafloor anchor and instrument frame. These elements work together as a system that not only provides the necessary mechanical integrity for the mooring, but also provides mounting points for instrumentation and a reliable electrical pathway from the surface to the seafloor.
{"title":"Coastal Surface Mooring Developments for the Ocean Observatories Initiative (OOI)","authors":"D. Peters, J. Kemp, A. Plueddemann","doi":"10.4031/mtsj.56.6.2","DOIUrl":"https://doi.org/10.4031/mtsj.56.6.2","url":null,"abstract":"Abstract Multiple mooring components have been developed at Woods Hole Oceanographic Institution (WHOI) that represent significant advancements in mooring technology. The Ocean Observatories Initiative (OOI) Coastal Surface Moorings are a unique coalescence of these elements\u0000 into a robust and capable electromechanical mooring design. This paper describes innovative design elements in three key areas that are used operationally on OOI moorings: (1) components at the interface between buoy base and mooring riser, (2) electro-mechanical mooring riser components,\u0000 and (3) an integrated seafloor anchor and instrument frame. These elements work together as a system that not only provides the necessary mechanical integrity for the mooring, but also provides mounting points for instrumentation and a reliable electrical pathway from the surface to the seafloor.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42889008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Chavez, R. Riley, Eric Gay, Jules Friderich, Nicholas Trautman, C. Kohler
Abstract In today's world where there is an increasing need to monitor and understand our changing oceans, under flat or shrinking budgets, it is challenging for a single organization to tackle problems of this scale and magnitude alone. Engineers and scientists from the National Oceantic and Atmospheric Administration's National Data Buoy Center (NDBC) and the Monterey Bay Aquarium Research Institute (MBARI) began a collaboration with this challenge in mind. The collaboration took advantage of each organization's strengths: MBARI has the capability to rapidly develop new instrument systems, and NDBC has the infrastructure on which to test their capabilities in the field. Here, we present development efforts that led to the deployment of a small partial pressure of carbon dioxide (pCO2) sensor system developed by MBARI on an NDBC buoy. The overarching goal was to demonstrate the utility of NDBC's new Auxiliary (Aux) module and determine the ease of adding third-party instrumentation to NDBC buoys. The Aux module is part of NDBC's latest generation of weather buoy data acquisition and reporting system, which provides more modularity and flexibility over previous systems. Given the large number of NDBC buoys currently in service, this capability opens up the possibility of a dense array of low-cost sensors to complement more highly specialized expensive mooring systems that are sparsely distributed. The partnership process led to the successful deployment of the pCO2 system on NDBC buoy 46013 off Bodega Bay, California, about 48 nautical miles northwest of San Francisco, for over a year of unattended operation. The technical and scientific results are described.
{"title":"A Mooring Development and Implementation Case Study of a Government/Private Partnership","authors":"F. Chavez, R. Riley, Eric Gay, Jules Friderich, Nicholas Trautman, C. Kohler","doi":"10.4031/mtsj.56.6.6","DOIUrl":"https://doi.org/10.4031/mtsj.56.6.6","url":null,"abstract":"Abstract In today's world where there is an increasing need to monitor and understand our changing oceans, under flat or shrinking budgets, it is challenging for a single organization to tackle problems of this scale and magnitude alone. Engineers and scientists from the\u0000 National Oceantic and Atmospheric Administration's National Data Buoy Center (NDBC) and the Monterey Bay Aquarium Research Institute (MBARI) began a collaboration with this challenge in mind. The collaboration took advantage of each organization's strengths: MBARI has the capability to rapidly\u0000 develop new instrument systems, and NDBC has the infrastructure on which to test their capabilities in the field. Here, we present development efforts that led to the deployment of a small partial pressure of carbon dioxide (pCO2) sensor system developed by MBARI on an NDBC buoy.\u0000 The overarching goal was to demonstrate the utility of NDBC's new Auxiliary (Aux) module and determine the ease of adding third-party instrumentation to NDBC buoys. The Aux module is part of NDBC's latest generation of weather buoy data acquisition and reporting system, which provides more\u0000 modularity and flexibility over previous systems. Given the large number of NDBC buoys currently in service, this capability opens up the possibility of a dense array of low-cost sensors to complement more highly specialized expensive mooring systems that are sparsely distributed. The partnership\u0000 process led to the successful deployment of the pCO2 system on NDBC buoy 46013 off Bodega Bay, California, about 48 nautical miles northwest of San Francisco, for over a year of unattended operation. The technical and scientific results are described.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46470695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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