Current practice for maritime search and rescue (MSAR) adheres to predetermined full-coverage patterns for finding targets. These do not account for key success factors for MSAR missions such as the dynamic location of targets, updates on situational awareness during mission execution, and search vehicle kinematics. Consequently, current practice cannot incorporate realistic MSAR operational conditions into path-finding, increasing the likelihood of mission failure. To address this issue, a novel, flexible path-finding framework is proposed for generating a path while dynamically updating the probability of a target based on the path's trajectories. The solution approach implements the A* algorithm, which can accommodate the dynamics of a vehicle and guarantees the optimality of the final path with respect to the target objective function. Experiments show that a more than 50% improvement in the time needed to guarantee a certain probability of finding a target is exhibited compared to the parallel sweep coverage path-finding approach.
A recently signed memorandum of understanding (MoU) between Ethiopia and Somaliland to develop the Port of Berbera and establish a naval base has sparked tensions and fears of conflict with Somalia. The MoU grants Ethiopia commercial access to Somaliland ports and a 20-kilometer lease for a naval base in exchange for Ethiopia's recognition of Somaliland's independence, drawing strong criticism from Somalia, which considers Somaliland part of its territory.
The article, ‘Logistics, Politics and Berbera in the Eye of an International Storm’ examines how the pursuit of economic development through logistics infrastructure can exacerbate political tensions and reignite historical conflicts. The Berbera corridor, envisioned as a pathway to peace, stability, and prosperity through economic interdependence, now underscores the potential for violent conflict inherent in modern logistics and infrastructure development. The case furthermore brings out the complex interplay of local, regional, and international interests at play in the Horn of Africa. Thus, the port's upgrade, intended to attract foreign investment and transform the area into a major trade hub, has intensified competition among Somaliland's clan lineages, inflamed historical tensions between Somalia and Ethiopia, and challenged the security and logistic interests of regional and global powers in the Red Sea and Western Indian Ocean.
The article is part of a special issue of Politique Africaine about the current armed conflicts in the Horn of Africa.
The success of the Seychelles Coast Guard shows how regional states, however tiny, can play an outsized role not only in countering piracy but also in maritime security in general. By taking quick and sharp action against malicious actors, small states can make a major contribution to regional maritime security. To stop the ominous return of piracy and address other maritime crimes like illegal fishing, smuggling, and pollution crimes across the world’s oceans, the contributions of small states will be crucial. Drawing on the Seychelles example, small states should overcome the sea blindness that pervades in many governments, recognize the sustainable development benefits from the blue economy, and understand security at sea as a political priority, while making efficient use of external security assistance.
Maritime piracy incidents present significant threats to maritime security, resulting in material damages and jeopardizing the safety of crews. Despite the scope of the issue, existing research has not adequately explored the diverse risks and theoretical implications involved. To fill that gap, this paper aims to develop a comprehensive framework for analyzing global piracy incidents. The framework assesses risk levels and identifies patterns from spatial, temporal, and spatio-temporal dimensions, which facilitates the development of informed anti-piracy policy decisions. Firstly, the paper introduces a novel risk assessment mechanism for piracy incidents and constructs a dataset encompassing 3,716 recorded incidents from 2010 to 2021. Secondly, this study has developed a visualization and analysis framework capable of examining piracy incidents through the identification of clusters, outliers, and hot spots. Thirdly, a number of experiments are conducted on the constructed dataset to scrutinize current spatial-temporal patterns of piracy accidents. In experiments, we analyze the current trends in piracy incidents on temporal, spatial, and spatio-temporal dimensions to provide a detailed examination of piracy incidents. The paper contributes new understandings of piracy distribution and patterns, thereby enhancing the effectiveness of anti-piracy measures.
Satellite imagery has become a fundamental part for maritime monitoring and safety. Correctly estimating a ship's identity is a vital tool. We present a method based on facial recognition for identifying ships in satellite images. A large ship dataset is constructed from Sentinel-2 multispectral images and annotated by matching to the Automatic Identification System. Our dataset contains 7.000 unique ships, for which a total of 16.000 images are acquired. The method uses a convolutional neural network to extract a feature vector from the ship images and embed it on a hypersphere. Distances between ships can then be calculated via the embedding vectors. The network is trained using a triplet loss function, such that minimum distances are achieved for identical ships and maximum distances to different ships. Comparing a ship image to a reference set of ship images yields a set of distances. Ranking the distances provides a list of the most similar ships. The method correctly identifies a ship on average 60 % of the time as the first in the list. Larger ships are easier to identify than small ships, where the image resolution is a limitation.
Maritime security is a major international concern with the Gulf of Guinea recognised as one of the global hotspots of blue crime, such as piracy, kidnap for ransom, trafficking of narcotics, human and arms, and illegal fishing. The complex and complicated challenge of maritime security, a wicked problem, calls for inter-agency coordination, synergy of efforts and scaling up of responses. Given the complexity of maritime security threats, no single organisation has the institutional muscle to single-handedly deal with it. Drawing on evidence from Ghana, where the arrival of maritime security as a concept triggered a shift from single to a multi-agency approach to dealing with maritime issues, the article examines the potential of and challenges associated with inter-agency coordination. In line with recent international developments, African nations like Ghana aim to apply the concept of inter-agency coordination to tackle maritime insecurity in its waters. The paper assesses how inter-agency coordination could be used in an African maritime security governance context, while examining power imbalance, strife for agency autonomy and other obstacles that have to be addressed to ensure that the promises associated with the concept are fulfilled.
Maritime security in the Gulf of Guinea is a challenge that straddles multiple players and sectors, and crimes like piracy cause disruptions to international trade and shipping. During the COVID-19 pandemic, the global shipping industry tried to keep maritime security on the agenda, while advocating for global security assemblages, specifically, transnational policing initiatives as part of the maritime security governance. Using the notion of narratives and assemblage thinking, it is argued that although global shipping and Ghanaian state agents agree on the problem, they differ on which maritime security governance infrastructure to deploy, resulting in tensions between the two parties.
Recent advances, especially in deep learning, allow to effectively detect ship targets in surveillance videos. However, the translation of these detections to the real-world locations of ships has not been sufficiently explored. The common approach in the literature is using a transformation matrix to convert a pixel to a real-world coordinate. However, this approach has three shortcomings: first, a set of reference point pairs has to be manually prepared to establish the matrix; second, the matrix always maps a pixel to the same real-world coordinate, ignoring that there is no one-to-one correspondence between discrete pixel coordinates and continuous real-world coordinates; third, this approach can only work with one camera. In light of this, we propose a technique PixelToRegion that explicitly takes into account the uncertainty in coordinate conversion by mapping each pixel to a spatial polygon. Next, we propose a new algorithm MCbSLE that can estimate ship locations using pixel sets from multiple cameras. The precision of location estimation by MCbSLE is enhanced through spatial intersection between polygons from different cameras. Experiments are conducted under 16 carefully designed multi-camera settings to evaluate MCbSLE wrt four factors: different ports, the number of cameras, the distance between cameras, and camera headings. Results on one-day ship trajectory data show that (1) an 79.8% accuracy in the number of coordinates can be achieved by MCbSLE when there are no more than 10 ships in camera views; (2) using multiple cameras can improve the precision of location estimation by one order of magnitude compared with using one camera.
Long considered a cultural contact zone, the Mediterranean has become a weaponised border zone keeping refugees from Africa and the MiddleEast away from ‘Fortress Europe’. The Mediterranean has become excessively dangerous to cross, leading many commentators to call this maritime space a ‘massive graveyard’. The widespread indifference and enmity towards migrants in Europe is, amongst other things, countered by documentary and commemorative projects by artists drawing attention to the suffering of drowned refugees. In this paper, I zoom in on documentary and memorial artistic projects by Mimmo Paladino, Jason deCaires Taylor, Christoph Büchel, Ai Weiwei and Đỉnh Q. Lê. In the frequent absence of dead bodies and specific grave sites on the ‘high seas’, they make claims regarding the humanity, singularity and memorability of the human lives of refugees drowned at sea. Based on a description of the artworks and their public, I make two interlinked theoretical arguments. First, the commemorative materialisations by contemporary artists are temporal claims to constitute the cultural heritage of the future. Second, given the sea’s aquatic materiality, the commemorative claims of these art projects require that commemorative materialisations must spatially move from the flux of the sea to the fixity of the land.