Journal article
How Good is the STW Sensor? An Account from a Larger Shipping Company
Fluid Mechanics, Coastal and Maritime Engineering, Department of Mechanical Engineering, Technical University of Denmark1
Department of Mechanical Engineering, Technical University of Denmark2
Maersk Group3
Maersk Line Fleet Performance4
Automation and Control, Department of Electrical Engineering, Technical University of Denmark5
Department of Electrical Engineering, Technical University of Denmark6
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.
| Language: | English |
|---|---|
| Publisher: | MDPI AG |
| Year: | 2021 |
| Pages: | 465 |
| ISSN: | 20771312 |
| Types: | Journal article |
| DOI: | 10.3390/jmse9050465 |
| ORCIDs: | Ikonomakis, Angelos , Nielsen, Ulrik Dam , 0000-0002-1364-6789 , 0000-0001-6493-306X and Galeazzi, Roberto |
