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With the development of the marine economy, video surveillance has become an important technical guarantee in the fields of marine engineering, marine public safety, marine supervision, and maritime traffic safety. In video surveillance, maritime object detection (MOD) is one of the most important core technologies. Affected by the size of maritime objects, distance, day and night weather, and changes in sea conditions, MOD faces challenges such as false detection, missed detection, slow detection speed, and low accuracy. However, the existing object detection algorithms usually adopt predefined anchor boxes to search and locate for objects of interest, making it difficult to adapt to maritime objects' complex features, including the varying scale and large aspect ratio difference. Therefore, this paper proposes a maritime object detection algorithm based on the improved convolutional neural network (CNN). Firstly, a differential-evolutionary-based K-means (DK-means) anchor box clustering algorithm is proposed to obtain adaptive anchor boxes to satisfy the maritime object characteristics. Secondly, an adaptive spatial feature fusion (ASFF) module is added in the neck network to enhance multi-scale feature fusion. Finally, focal loss and efficient intersection over union (IoU) loss are adopted to replace the original loss function to improve the network convergence speed. The experimental results on the Singapore maritime dataset show that our proposed algorithm improves the average precision by 7.1%, achieving 72.7%, with a detection speed of 113 frames per second, compared with You Only Look Once v5 small (YOLOv5s). Moreover, compared to other counterparts, it can achieve a better speed-accuracy balance, which is superior and feasible for the complex maritime environment.

Five fishermen dead and six missing after box ship collision.

The U.S. National Transportation Safety Board will resume its search for the voyage data recorder or "black box" from the El Faro on Monday.

Firefighters Find Black Box on Still-Burning Greek Ferry.

Another box ship crew scramble for their lives as containers catch fire.

Norwegian places order for first crewless 100 - 150 TEU box ship.

Iranian box ship veers off to starboard and rams HK's Magazine Island.

Big Box Ships Are Booming - VesselsValue.

Disabled Russian Box Ship "Simushir" Reaches Prince Rupert.

Sanchi's Black Box Opened -Iranian Media.

India's Largest Box Port Hit By Cyber Attack.

Super Typhoon Meranti, the strongest storm on record anywhere in the world so far this year, wreaked havoc and chaos as it transited near Taiwan's main port of Kaohsiung yesterday. A 14,000 teu newbuild, unfortunately named YM Wind, broke from its mooring lines at local yard CSBC and drifted to Kaohsiung's sixth container terminal where …