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How Good Is the STW Sensor? An Account from a Larger Shipping Company
Journal of Marine Science and Engineering ( IF 2.9 ) Pub Date : 2021-04-25 , DOI: 10.3390/jmse9050465
Angelos Ikonomakis , Ulrik Dam Nielsen , Klaus Kähler Holst , Jesper Dietz , Roberto Galeazzi

This paper examines the statistical properties and the quality of the speed through water (STW) measurement based on data extracted from almost 200 container ships of Maersk Line’s fleet for 3 years of operation. The analysis uses high-frequency sensor data along with additional data sources derived from external providers. The interest of the study has its background in the accuracy of STW measurement as the most important parameter in the assessment of a ship’s performance analysis. The paper contains a thorough analysis of the measurements assumed to be related with the STW error, along with a descriptive decomposition of the main variables by sea region including sea state, vessel class, vessel IMO number and manufacturer of the speed-log installed in each ship. The paper suggests a semi-empirical method using a threshold to identify potential error in a ship’s STW measurement. The study revealed that the sea region is the most influential factor for the STW accuracy and that 26% of the ships of the dataset’s fleet warrant further investigation.

中文翻译:

STW传感器的性能如何?大型货运公司的帐户

本文基于从马士基航运公司近200艘运营3年的船队中提取的数据,检验了统计特性和水速测量的质量。该分析使用了高频传感器数据以及来自外部提供商的其他数据源。这项研究的兴趣在于将STW测量的准确性作为评估船舶性能分析中最重要的参数的背景。本文对假定与STW误差有关的测量进行了全面分析,并对海域的主要变量进行了描述性分解,包括海况,船级,船舶IMO编号以及每个航速器中安装的速度记录仪的制造商船。该论文提出了一种半经验方法,该方法使用阈值来识别船舶的STW测量中的潜在误差。研究表明,海域是影响STW精度的最主要因素,并且26 数据集船队中的哪些船舶需要进一步调查。
更新日期:2021-04-26
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