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Journal of Marine Science and Engineering, Volume 11, Issue 8

August 2023 - 156 articles

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Cover Story: Plastic debris makes up the majority of ocean litter and is a known source of microplastics in the ocean. This study presents a comparison between two instance segmentation models, YOLACT and Mask R-CNN, on the detection of seafloor litter. Instance segmentation allows for pixel-accurate differentiation of objects from the background for use in automated litter collection systems. The models are both trained on the TrashCAN dataset containing observations of seafloor litter. The models have differing characteristics, with YOLACT being lightweight and fast, allowing for quick detections at higher framerates and Mask R-CNN being slower but more accurate. The comparison found that YOLACT was able to perform at much higher speeds with a comparatively smaller trade-off in accuracy, allowing for use in Automated Underwater Vehicle collection systems. View this paper

Articles (156)

  • Article
  • Open Access
2 Citations
2,463 Views
62 Pages

This is a new installment in the series of publications that describe the mathematical modeling of the Floating Hybrid Generator Systems Simulator (FHYGSYS) tool. This work presents an improved mathematical model of the turbines of the floating hybri...

  • Article
  • Open Access
5 Citations
2,391 Views
19 Pages

This research investigates the application of photovoltaic (PV) systems on ship retrofits with the aim of reducing the emission of harmful gases. By using renewable energy resources, this research presents the potential for reducing greenhouse gas (G...

  • Article
  • Open Access
19 Citations
3,043 Views
32 Pages

Underwater acoustic channels, influenced by time-varying, space-varying, frequency-varying, and multipath effects, pose significant interference challenges to underwater acoustic communication (UWAC) signals, especially in non-cooperative scenarios....

  • Article
  • Open Access
2 Citations
1,767 Views
17 Pages

Bearing Characteristics of Tripod Bucket Foundation under Horizontal and Moment Load in Sand

  • Xin Wang,
  • Xue-Liang Zhao,
  • Shu-Huan Sui,
  • Zi-Bei Hu,
  • Wen-Ni Deng and
  • Qi-Ming Song

Based on a series of physical model tests and numerical simulations, the bearing characteristics of a tripod-bucket foundation are investigated. It is found that with the decrease in aspect ratio (L/D), the rotation center of the foundation will decr...

  • Article
  • Open Access
6 Citations
2,757 Views
23 Pages

Fit-for-Purpose Information for Offshore Wind Farming Applications—Part-I: Identification of Needs and Solutions

  • Jun She,
  • Anouk Blauw,
  • Lauri Laakso,
  • Baptiste Mourre,
  • Johannes Schulz-Stellenfleth and
  • Henning Wehde

The rapid expansion of offshore wind farms (OWFs) in European seas is accompanied by many challenges, including efficient and safe operation and maintenance, environmental protection, and biodiversity conservation. Effective decision-making for indus...

  • Article
  • Open Access
8 Citations
2,437 Views
18 Pages

Underwater Acoustically Guided Docking Method Based on Multi-Stage Planning

  • Hongli Xu,
  • Hongxu Yang,
  • Zhongyu Bai and
  • Xiangyue Zhang

Autonomous underwater vehicles (AUVs) are important in areas such as underwater scientific research and underwater resource collection. However, AUVs suffer from data portability and energy portability problems due to their physical size limitation....

  • Article
  • Open Access
6 Citations
1,850 Views
17 Pages

Upwellings and Downwellings Caused by Mesoscale Water Dynamics in the Coastal Zone of Northeastern Black Sea

  • Oleg I. Podymov,
  • Vladimir V. Ocherednik,
  • Ksenia P. Silvestrova and
  • Andrei G. Zatsepin

The paper analyzes quasiperiodic upwellings and downwellings on the shelf and upper part of continental slope of the northeastern Black Sea. It is shown that these processes are related to changes in intensity and direction of alongshore current and...

  • Article
  • Open Access
3 Citations
1,681 Views
23 Pages

A Subaperture Motion Compensation Algorithm for Wide-Beam, Multiple-Receiver SAS Systems

  • Jiafeng Zhang,
  • Guangli Cheng,
  • Jinsong Tang,
  • Haoran Wu and
  • Zhen Tian

Uncompensated motion errors can seriously affect the imaging quality of synthetic aperture sonars (SASs). In the existing line-by-line motion compensation (MOCO) algorithms for wide-beam multiple-receiver SAS systems, the approximate form of the rang...

  • Article
  • Open Access
13 Citations
3,391 Views
17 Pages

Underwater acoustic target recognition methods based on time-frequency analysis have shortcomings, such as missing information on target characteristics and having a large computation volume, which leads to difficulties in improving the accuracy and...

  • Article
  • Open Access
3 Citations
1,879 Views
19 Pages

Low-visibility maritime image enhancement is essential for maritime surveillance in extreme weathers. However, traditional methods merely optimize contrast while ignoring image features and color recovery, which leads to subpar enhancement outcomes....

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J. Mar. Sci. Eng. - ISSN 2077-1312Creative Common CC BY license