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What are the best practices for hydrographic survey quality control?

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Hydrographic surveying is the process of measuring and mapping the features and contours of water bodies and adjacent land areas. It is essential for many construction projects that involve marine, coastal, or inland waterways, such as bridges, dams, ports, pipelines, and offshore structures. Hydrographic survey quality control (QC) is the practice of ensuring that the data collected by the surveyors meets the required accuracy, completeness, and consistency standards. QC also involves checking the equipment, procedures, and personnel involved in the surveying process. In this article, you will learn about some of the best practices for hydrographic survey QC and how they can improve your project outcomes.

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Raquel Von Rondow Rojo

Diretora de Implanta??o de Projetos Correntes na VALE | Lideran?a, Performance e ESG

1 Define the scope and specifications

Before starting any hydrographic survey, you need to define the scope and specifications of the project. This includes identifying the purpose, objectives, and deliverables of the survey, as well as the expected quality and accuracy levels. You also need to consider the environmental and operational conditions, such as water depth, currents, tides, weather, and accessibility. Based on these factors, you can select the most suitable survey methods, equipment, and personnel for the job. You should also establish a clear communication plan and reporting protocol with the client and other stakeholders.

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Seyed Amin Noori

Owner/CEO@Noori Construction Group| Senior Construction Manager MSc in Engineering and Construction Management| DBA, Doctorate of Business Administration
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Establish a Quality Management System (QMS) Ensure proper calibration of equipment Conduct pre-survey checks to ensure that all equipment is functioning properly. Develop Standard Operating Procedures (SOPs) for all aspects of the survey process, including data acquisition, processing, and reporting. Perform data validation and processing quality control using established procedures. Conduct post-survey checks to ensure that all data has been collected and processed correctly. Train personnel in the use of the equipment, the survey procedures, and the quality control procedures. Document all aspects of the survey process, including data acquisition, processing, and reporting

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2 Calibrate and test the equipment

Hydrographic survey equipment, such as echo sounders, GPS receivers, tide gauges, and motion sensors, need to be calibrated and tested regularly to ensure their optimal performance and reliability. Calibration is the process of adjusting the equipment to match a known standard or reference value. Testing is the process of verifying the equipment's functionality and accuracy under different conditions. You should follow the manufacturer's guidelines and industry standards for calibration and testing procedures and frequencies. You should also document the results and keep a log of any maintenance or repairs.

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Jamaleddin Shaaban

Technical Audit Director “QA/QC & HSE “, CONTRACTING DIVISION,NON-HARAMAIN,SAUDI BINLADIN GROUP
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I suggest to add the following practices: 6. Apply preventive maintenance 7. Apply training and competency 8. Apply peer company review By following the above mentioned practices hydrographic surveyors can improve the accuracy, reliability, and consistency of their data, ultimately leading to better decision-making and safer navigation in marine environment.

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3 Implement quality checks and audits

Quality checks and audits are the processes of reviewing and verifying the data collected by the surveyors during and after the survey. Quality checks are usually performed by the surveyors themselves or by a designated QC officer on board the survey vessel. Quality audits are usually performed by an independent or external party, such as a client representative or a third-party consultant. Quality checks and audits involve comparing the data with the specifications, checking for errors, anomalies, or gaps, and applying corrections or adjustments if needed. You should use appropriate software tools and methods for quality checks and audits, such as cross-checking, error analysis, data filtering, and data validation.

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4 Follow safety and ethical standards

Safety and ethical standards are the rules and principles that govern the conduct and behavior of the surveyors and the survey organization. Safety standards aim to protect the health and well-being of the surveyors and the public, as well as to prevent damage or harm to the environment and property. Ethical standards aim to ensure the integrity, professionalism, and accountability of the surveyors and the survey organization. You should follow the safety and ethical standards set by your organization, your client, and your industry association or regulatory body. You should also report any incidents, accidents, or violations that occur during the survey.

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Raquel Von Rondow Rojo

Diretora de Implanta??o de Projetos Correntes na VALE | Lideran?a, Performance e ESG
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ética é um valor inegociável juntamente com a seguran?a. N?o a atividade que possa negligenciar qualquer uma das duas. Isso vale para todas as áreas. Tenha isso como um basti?o, n?o aceite flexibiliza??es com rela??o a isso. Seja exemplo e um incentivador, isso é algo essencial para a integridade profissional sua e de toda sua equipe.

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5 Document and archive the data

Documentation and archiving are the processes of recording and storing the data and information generated by the survey. Documentation includes creating and updating the survey plan, the survey report, the data sheets, the charts, and the maps. Archiving includes backing up and transferring the data and information to a secure and accessible location, such as a server, a cloud, or a physical storage device. You should document and archive the data and information in a clear, consistent, and standardized format and structure. You should also follow the data management and retention policies and practices of your organization and your client.

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Raquel Von Rondow Rojo

Diretora de Implanta??o de Projetos Correntes na VALE | Lideran?a, Performance e ESG
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As ferramentas hoje disponível para documenta??o e arquivamento de dados s?o inúmeros, de modo que n?o há como n?o se garantir o atendimento dessa necessidade ou risco de perda de dados por n?o haver arquivo correto e seguro. O mais recomendado é sempre o backup em sistema ou nuvem, com frequência, a guarda das informa??es no mínimo pelo período previsto em Lei ou garantia do servi?o e ter um fluxo e procedimento para tal. Evitará grandes riscos e dores de cabe?a no futuro.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are the best practices for hydrographic survey quality control?

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1 Define the scope and specifications

2 Calibrate and test the equipment

3 Implement quality checks and audits

4 Follow safety and ethical standards

5 Document and archive the data

6 Here’s what else to consider

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