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Exploration of COLREG-relevant parameters from historical AIS-data J. Navigation. (IF 2.4) Pub Date : 2024-04-18 Inger B. Hagen, Karen S. Knutsen, Tor Arne Johansen, Edmund Brekke
Reliable anti-collision control algorithms conforming with the rules regulating traffic at sea, the International Regulations for Preventing Collisions at Sea (COLREG), are essential for the deployment of autonomous vessels in waters shared with other ships. The development of such methods is an active field of research. However, little attention has been given to how these rules are interpreted by
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A switched adaptive strategy for state estimation in MEMS-based inertial navigation systems with application for a flight test J. Navigation. (IF 2.4) Pub Date : 2024-04-02 Mohammad Saber Fadaki, Hamid Reza Koofigar, Mohsen Ekramian, Mahdi Mortazavi
This paper proposes a switched model to improve the estimation of Euler angles and decrease the inertial navigation system (INS) error, when the centrifugal acceleration occurs. Depending on the situation, one of the subsystems of the proposed switched model is activated for the estimation procedure. During global positioning system (GPS) outages, an extended Kalman filter (EKF) operates in the prediction
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Waylosing and wayfinding in the outdoors: a typology of wayfinding approaches to problem-solving when temporarily lost J. Navigation. (IF 2.4) Pub Date : 2024-03-08 Ole Edward Wattne, Frode Volden
This paper presents the findings from a survey conducted in Norway to study the process of recovering from temporary disorientation in outdoor environments. The survey, with 693 respondents, investigated how individuals navigate and regain their bearings after getting disoriented for a short period of time. By collecting data on duration of disorientation and descriptions of participants' recovery
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Scientific basis for improving the efficiency of urban street and road network operation J. Navigation. (IF 2.4) Pub Date : 2024-03-06 Shilin Yang, Oleksandr Stepanchuk, Olexandr Pylypenko, Junwen Ji, Andrii Bieliatynskyi
The study is an experimental and theoretical analysis of the patterns of traffic flows and the possibilities of their distribution on urban street and road networks. It considers and analyses modern approaches that make it possible to improve traffic flow control mechanisms and traffic conditions on a street and road network. Based on the established internal relationships, the paper develops a model
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Radar-based path planning of autonomous surface vehicle with static and dynamic obstacles in a Frenet Frame J. Navigation. (IF 2.4) Pub Date : 2024-03-04 Zhihuan Hu, Ziheng Yang, Xiaocheng Liu, Weidong Zhang
Navigation safety at sea is vital for each autonomous surface vehicle (ASV), which involves the problem of motion planning in dynamic environments and their robust tracking through feedback control. We present a practical path-planning method that generates smooth trajectories for a marine vehicle traveling in an unknown environment, where obstacles are detected in real time by millimetre wave (mmWave)
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Autonomous multicopter landing on a moving vehicle based on RSSI J. Navigation. (IF 2.4) Pub Date : 2024-02-12 Jongwoo An, Hosun Kang, Jiwook Choi, Jangmyung Lee
Currently, most of the studies on unmanned aerial vehicle (UAV) automatic landing systems mainly depend on image information to determine the landing location. However, the system requires a camera, a gimbal system and a separate image-processing device, which increases the weight and power consumption of the UAV, resulting in a shorter flight time. In addition, a large amount of computation and slow
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Latitude by two altitudes of the Sun – Douwes’ and Riddle's methods J. Navigation. (IF 2.4) Pub Date : 2024-02-12 Ana Filipa Queirós, António Costa Canas, Teresa Sousa
In approximately 1740, Cornelis Douwes presented an algorithmic method to determine the latitude when it is impossible to observe the Sun at the meridian passage. To apply Douwes’ method, it is necessary to know two altitudes of the Sun, the time elapsed between observations, the Sun's declination at the time when the greater altitude was observed and the latitude by account. Douwes’ method, originally
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Mental maps, practical mastery and environmental experience: an analysis of the wayfinding culture of Evenki reindeer herders and hunters J. Navigation. (IF 2.4) Pub Date : 2024-01-26 Pablo Fernández Velasco, Anna Gleizer
The present work explores the link between navigational processes and the experience of place by considering the case of Evenki reindeer herders and hunters. Our analysis shows how the idiosyncratic wayfinding methods of the Evenki result in a unique experience of place – a case that elucidates the important question of the impact of navigational processes on environmental experience, and that advances
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Study of the applicability of radio signals emitted by lightning for long-range navigation J. Navigation. (IF 2.4) Pub Date : 2024-01-25 Pavel Kovář, Pavel Puričer, Jan Mikeš
The complementary radio navigation system based on the Very Low Frequency signals produced by lightning is an alternative to today's Global Navigation Satellite Systems. The system operates on different principles and uses different radio frequency bands. The signals have higher availability in problematic places. The analyses based on the historical data of Word Wide Lightning Location Network demonstrated
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Reliable strategies for implementing model-based navigation on fixed-wing drones J. Navigation. (IF 2.4) Pub Date : 2023-12-18 Gabriel Laupré, Lucas Pirlet, Jan Skaloud
A relatively novel approach of autonomous navigation employing platform dynamics as the primary process model raises new implementational challenges. These are related to: (i) potential numerical instabilities during longer flights; (ii) the quality of model self-calibration and its applicability to different flights; (iii) the establishment of a global estimation methodology when handling different
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A study on the development and trend of COLREGs – A broader perspective J. Navigation. (IF 2.4) Pub Date : 2023-11-21 Wenhai Dong, Jie Li, Xinghua Tu
With the rapid development of the maritime industry and the emergence of unmanned ships, it is necessary to continuously review the International Regulations for Preventing Collisions at Sea (1972, COLREGs). This paper provides an overview of the developing history of the COLREGs and summarises the interpretations made by the International Maritime Organization official and academic scholars. Additionally
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A framework of marine collision risk identification strategy using AIS data J. Navigation. (IF 2.4) Pub Date : 2023-11-16 Xiaofei Ma, Guoyou Shi, Jiahui Shi, Jiao Liu
Collisions are one of the major accidents in the shipping industry, causing significant losses. In this work, a framework of marine collision risk identification strategy was developed to quantitatively analyse collision risks and provide an easy and convenient way to monitor traffic flow in relevant waters to mitigate the chances of collision. The model was verified by using automatic identification
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GPS + Galileo + BDS-3 medium to long-range single-baseline RTK: an alternative for network-based RTK? J. Navigation. (IF 2.4) Pub Date : 2023-08-31 Sermet Ogutcu, Salih Alcay, Behlul Numan Ozdemir, Huseyin Duman, Ulkunur Koray, Ceren Konukseven, Nesibe Gül Bilal
Thanks to the development of the real-time kinematic (RTK) algorithm and the emerging Global Navigation Satellite System (GNSS), especially for Galileo and BeiDou-3, reliable positioning accuracy for medium and long-baseline RTK became possible globally. Moreover, with the development of the GNSS receiver hardware, baseline length limitations due to radio-based communications are removed thanks to
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Selected issues of optimising parameters on square riggers to maximise speed J. Navigation. (IF 2.4) Pub Date : 2023-08-15 Szymański Rafał, Specht Cezary
Due to the exceptional complexity of the propulsion system (sails), square-riggers form a special group of sailing vessels. In modern pleasure and sport sailing, simple Bermuda (triangular) sailing rigging prevails, which is widely discussed in the literature, both in terms of theory and numerous experiments. The literature on the theory on square-riggers is, in turn, limited mainly to the description
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Compass adjustment by GPS (or any other GNSS receiver) and a single visual reference J. Navigation. (IF 2.4) Pub Date : 2023-08-01 Jorge Moncunill Marimón, Francisco Javier Martínez de Osés, Rafael Cabal Álvarez
This paper proposes a proper compass adjustment method using only a GPS (or any other GNSS receiver) and a single visual reference to enhance the efficiency of compass adjustment. During compass adjustment, the ship proceeds on magnetic courses using a gyroscopic or satellite compass and considering magnetic declination. However, non-magnetic compasses are only compulsory for ships of 500 gross tonnage
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Navigation pattern extraction from AIS trajectory big data via topic model J. Navigation. (IF 2.4) Pub Date : 2023-07-10 Iwao Fujino, Christophe Claramunt
This paper introduces a novel approach for extracting vessel navigation patterns from very large automatic identification system (AIS) trajectory big data. AIS trajectory data records are first converted to a series of code documents using vector quantisation, such as k-means and PQk-means algorithms, whose performance is evaluated in terms of precision and computational time. Therefore, a topic model
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Resolving problems in symbol identification in compilation of electronic navigational charts utilising paper charts J. Navigation. (IF 2.4) Pub Date : 2023-06-29 P.B.A. Fernando, S.N. Lewis, A.N.D. Perera, M.D.E.K. Gunathilaka
Electronic navigational charts (ENCs) can be compiled using existing paper charts to improve their coverage of the world's oceans. However, in the process of assigning symbols on ENCs, in some cases the software uses the same symbol for different paper chart symbols. This could ultimately compromise maritime safety. Addressing this issue, this paper describes a methodology for developing a new tool
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Minimum required accuracy for HD maps J. Navigation. (IF 2.4) Pub Date : 2023-06-22 Štěpán Křehlík, Marek Vanžura, Adam Skokan
Autonomous vehicles rely on a combination of sensors for safe navigation around the world. For precise localisation, high-definition (HD) maps are used. These maps are a representation of the world containing information about objects on the road infrastructure. Currently, there are tens of HD map makers, however, no rigorous description of the requirements for the accuracy of HD maps has been published
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A high-precision and efficient algorithm for space-based ADS-B signal separation J. Navigation. (IF 2.4) Pub Date : 2023-06-16 Yan Bi, Renbiao Wu, Qiongqiong Jia
Space-based automatic dependent surveillance-broadcast (ADS-B) receivers can cover thousands of aircraft, each transmitting 6 ⋅ 2 signals per second. As a result, ADS-B signals are very prone to overlap. When the number of aircraft covered by a receiver reaches 3,000, about 90 % of the signals will be overlapping. Overlapped signals can reduce the decoding accuracy of receivers, so that aircraft information
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Relation analysis of ship speed & environmental conditions: Can historic AIS data form a baseline for autonomous determination of safe speed? J. Navigation. (IF 2.4) Pub Date : 2023-06-09 Leif Ole Dreyer
As no internationally agreed-upon method for determining safe speed values currently exists, collecting vast amounts of information on conventional ship behaviour could be used to train autonomous ship intelligence in determining safe speeds in different conditions. This requires speed data collected from conventional ships to resemble what can be described as safe speeds. To test this, the Automatic
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Literature review on maritime cybersecurity: state-of-the-art J. Navigation. (IF 2.4) Pub Date : 2023-06-06 Hongchu Yu, Qiang Meng, Zhixiang Fang, Jingxian Liu
Maritime cybersecurity has attracted increasing attention in industrial and academic scope, which may be relevant to the increasing cyber-incidents in the maritime shipping industry. This paper presents a critical review of publications related to cybersecurity in the maritime transportation industry, to explore the current research status and gaps, as wells as to guide new probe avenues by employing
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Safety analysis of RNP approach procedure using fusion of FRAM model and Bayesian belief network J. Navigation. (IF 2.4) Pub Date : 2023-06-06 Diogo Oliveira, Alison Moraes, Moacyr Cardoso Junior, Leonardo Marini-Pereira
The use of the required navigation performance (RNP) procedure has been increasing for aircraft navigation, since it allows for better optimisation of the airspace, which is increasingly congested. The present work aims to investigate the application of the functional resonance analysis method (FRAM), combined with the quantitative analysis provided by the Bayesian belief network (BBN), to demonstrate
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Analysis and Discussion on Ellipsoidal and virtual sphere models used for transverse arrangement INS J. Navigation. (IF 2.4) Pub Date : 2023-05-19 Zhe Wen, Hongwei Bian, Heng Ma, Rongying Wang
Transverse arrangement is one of the main methods used in the polar inertial navigation system (INS). In the traditional algorithm, the calculation of using the earth ellipsoid model is complex, while using the earth sphere model cannot satisfy a high-accuracy application. Therefore, an approach based on the virtual sphere model is proposed, which has been proved in simulation experiments to reduce
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Robust train localisation method based on advanced map matching measurement-augmented tightly-coupled GNSS/INS with error-state UKF J. Navigation. (IF 2.4) Pub Date : 2023-05-12 Dan Liu, Wei Jiang, Baigen Cai, Oliver Heirich, Jian Wang, Wei Shangguan
This paper presents a robust train localisation system by fusing a Global Navigation Satellite System (GNSS) with an Inertial Navigation System (INS) in a tightly-coupled (TC) strategy. To improve navigation performance in GNSS partly blocked areas, an advanced map-matching (MM) measurement-augmented TC GNSS/INS method is proposed via an error-state unscented Kalman filter (UKF). The advanced MM generates
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Characterisation and position-aiding performance analysis of Doppler observation from android smartphones J. Navigation. (IF 2.4) Pub Date : 2023-04-28 Zihan Peng, Chengfa Gao, Hua Zou, Rui Shang, Qi Liu, Wu Zhao
It has been acknowledged that the Doppler is beneficial to the GNSS positioning of smartphones. However, analysis of Doppler precision on smartphones is insufficient. In this paper, we focus on the characteristic analysis of the raw Doppler measurement from Android smartphones. A comprehensive investigation of the Doppler was conducted. The results illustrate that the availability of Doppler is stable
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Collision risk quantification for pairs of recorded aircraft trajectories J. Navigation. (IF 2.4) Pub Date : 2023-04-26 Valtteri Kallinen, Steve Barry, Aaron McFadyen
Complex domestic airspace requires collision risk models and monitoring tools suitable for arbitrary aircraft trajectories. This paper presents a new mathematically based collision risk approach that extends the International Civil Aviation Organisation (ICAO) models to full aircraft encounters based on real trajectory data. A new continuous time intervention model is presented, along with a position
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Prescribed performance LOS guidance-based dynamic surface path following control of surface vessel with position and heading errors constraint J. Navigation. (IF 2.4) Pub Date : 2023-04-18 Zhipeng Shen, Ang Li, Li Li, Haomiao Yu
Concentrating on a surface vessel with input saturation, model uncertainties and unknown disturbances, a path following the adaptive backstepping control method based on prescribed performance line-of-sight (PPLOS) guidance is proposed. First, a prescribed performance asymmetric modified barrier Lyapunov function (PPAMBLF) is used to design the PPLOS and the heading controller, which make the path
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A collaborative collision avoidance strategy for autonomous ships under mixed scenarios J. Navigation. (IF 2.4) Pub Date : 2023-04-05 Shaobo Wang, Yingjun Zhang, Feifei Song, Wengang Mao
Ship collision avoidance has always been one of the classic topics in the field of marine research. In traditional encounter situations, officers on watch (OOWs) usually use a very high frequency (VHF) radio to coordinate each other. In recent years, with the continuous development of autonomous ships, there will be a mixed situation where ships of different levels of autonomy coexist at the same time
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Ionospheric correction of S-band tracking radar data using NavIC S-band signals in missile test range applications J. Navigation. (IF 2.4) Pub Date : 2023-04-05 Mrinal Goswami, Atanu Santra, Sukabya Dan, Rowdra Ghatak, Anindya Bose
In missile test ranges, complex missions demand precise trajectory generated by radar. Both the radar and Global Navigation Satellite System (GNSS) signals are affected by atmospheric effects, degrading their accuracy and performance. The Indian Regional Navigation Satellite System/Navigation with Indian Constellation (IRNSS/NavIC) transmits signals in the S-band together with the L-band. This paper
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Influence of chronometer error uncertainties on the Longitude of Shackleton's vessel, Endurance J. Navigation. (IF 2.4) Pub Date : 2023-02-21 Lars Bergman, David L. Mearns, Robin G. Stuart
In 1915 while the Imperial Trans-Antarctic Expedition's vessel Endurance was icebound in the Weddell Sea, lunar occultation timings were carried out in order to rate the chronometers and thereby find longitude. The original observations have been re-analysed using modern lunar ephemerides and catalogues of star positions. The times derived in this way are found to differ by an average of 20 s from
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Two sixteenth-century nautical charts of the South Atlantic Ocean: an early example of cartography used at sea J. Navigation. (IF 2.4) Pub Date : 2023-02-21 Šima Krtalić, Gregory C. McIntosh
Despite the crucial role played by nautical cartography during the 16th-century Iberian Expansion, surviving examples of charts used at sea are extremely rare, leaving gaps in our knowledge of how they were used in practice during this pivotal period. The present paper sheds light on this matter by introducing one of earliest extant Portuguese charts presenting positional fixes, which have so far gone
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Simplicity of a navigational path. What does that actually mean? J. Navigation. (IF 2.4) Pub Date : 2023-02-15 Piotr Kopacz
The understanding and interpretation of simplicty in the context of a navigational path can be ambiguous. Different approaches to path planning are briefly juxtaposed, focusing on their simplicity-based distinctive features. This takes into consideration the response to drift caused by air or water currents and the geometric background. Special attention is paid to the straight-line-based solutions
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A validation study of ISM Code's continual effectiveness through a multilateral comparative analysis of maritime accidents in Korean waters J. Navigation. (IF 2.4) Pub Date : 2023-02-15 Ick-soo Mok, Enrico D'agostini, Dong-keun Ryoo
This study investigates whether the International Safety Management (ISM) Code remains an effective regulatory tool for the shipping industry by analysing maritime accident statistics published for the last 32 years by the Korea Maritime Safety Tribunal, 24 years by the International Maritime Organization (IMO) and seven years by the European Maritime Safety Agency. For this purpose, the data were
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Low-cost integrated INS/GNSS using adaptive H∞ Cubature Kalman Filter J. Navigation. (IF 2.4) Pub Date : 2023-02-07 S. Taghizadeh, R. Safabakhsh
We proposed an adaptive H-infinity Cubature Kalman Filter (AH∞CKF) to improve the navigation accuracy of a highly manoeuvrable unmanned aerial vehicle (UAV). AH∞CKF fuses the Inertial Navigation System (INS) and Global Navigation Satellite System (GNSS) measurements. Traditional state estimation filters like extended Kalman filters (EKF) and cubature Kalman filters (CKF) assume Gaussian noises. However
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A review of ship collision risk assessment, hotspot detection and path planning for maritime traffic control in restricted waters J. Navigation. (IF 2.4) Pub Date : 2023-02-07 Hongchu Yu, Qiang Meng, Zhixiang Fang, Jingxian Liu, Lei Xu
The three research topics, ship collision risk assessment, ship traffic hotspot detection and prediction, and collision-avoidance based ship path planning, are vital for next-generation vessel traffic management and monitoring systems. The system development is closely related to big data analytics and artificial intelligence for restricted waters. This study, therefore, aims to analyse the state-of-the
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Sub-meter-level navigation with an enhanced multi-GNSS single-point positioning algorithm using iGMAS ultra-rapid products J. Navigation. (IF 2.4) Pub Date : 2023-02-03 Sinan Birinci, Mehmet Halis Saka
Ultra-rapid products have the advantage of being used in real-time positioning with no external connections. In this study, these products provided by the international GNSS Monitoring and Assessment System (iGMAS) for four global constellations (GPS, GLONASS, Galileo and BDS-3) were assessed in terms of service rate and accuracy in navigation. In this regard, a MATLAB-based in-house code solving the
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Cybersecurity risk assessment of VDR J. Navigation. (IF 2.4) Pub Date : 2023-01-31 Ömer Söner, Gizem Kayisoglu, Pelin Bolat, Kimberly Tam
The voyage data recorder (VDR) is a data recording system that aims to provide all navigational, positional, communicational, sensor, control and command information for data-driven investigation of accidents onboard ships. Due to the increasing dependence on interconnected networks, cybersecurity threats are one of the most severe issues and critical problems when it comes to safeguarding sensitive
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Ship routing optimisation based on forecasted weather data and considering safety criteria J. Navigation. (IF 2.4) Pub Date : 2023-01-27 Ageliki Kytariolou, Nikos Themelis
A weather routing tool is presented based on forecasted weather data along the route and considering safety aspects. The tool aims to determine the optimal path for the minimisation of the fuel oil consumption, ensuring a safe passage. It is developed in MATLAB and considers detailed ship characteristics. Specifically, ship's motions and fuel oil consumption of the main engine during a potential path
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Improving measurement performance via fusion of classical and quantum accelerometers J. Navigation. (IF 2.4) Pub Date : 2023-01-26 Xuezhi Wang, Allison Kealy, Christopher Gilliam, Simon Haine, John Close, Bill Moran, Kyle Talbot, Simon Williams, Kyle Hardman, Chris Freier, Paul Wigley, Angela White, Stuart Szigeti, Sam Legge
While quantum accelerometers sense with extremely low drift and low bias, their practical sensing capabilities face at least two limitations compared with classical accelerometers: a lower sample rate due to cold atom interrogation time; and a reduced dynamic range due to signal phase wrapping. In this paper, we propose a maximum likelihood probabilistic data fusion method, under which the actual phase
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Multiplicative extended Kalman filter ignoring initial conditions for attitude estimation using vector observations J. Navigation. (IF 2.4) Pub Date : 2023-01-12 Lubin Chang
In this paper, the well-known multiplicative extended Kalman filter (MEKF) is re-investigated for attitude estimation using vector observations. From the Lie group theory, it is shown that the attitude estimation model is group-affine and its error state model should be trajectory-independent. Moreover, with such a trajectory-independent error state model, the linear Kalman filter is still effective
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Virtual global positioning system construction approach for unmanned surface vessel based on Dempster–Shafer theory and broad learning framework J. Navigation. (IF 2.4) Pub Date : 2022-12-16 Chuang Zhang, Chunyan Cao, Kaihang Kang, Chen Guo, Muzhuang Guo
Integrated navigation systems made up of a strap-down inertial navigation system (SINS) and global positioning system (GPS) are increasingly being used to improve the position, speed, and attitude information of unmanned surface vessels (USV). However, a GPS outage could occur due to the dependence of GPS performance on the external environment and the number of available satellites. This study uses
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The impact of communication on the work performance of Chinese seafarers on board J. Navigation. (IF 2.4) Pub Date : 2022-10-06 Ji An, Wenting Gao, Runze Liu, Ziqi Liu
Effective communication among seafarers is an important part of ship resource management. The improvement of effective internal communication among seafarers has an important impact on the improvement of work performance. This paper conducts an empirical study to determine which factors are related to the impact of seafarers’ communication on work performance. A questionnaire was designed to investigate
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Data-driven model predictive control of underactuated ships with unknown dynamics in confined waterways J. Navigation. (IF 2.4) Pub Date : 2022-10-05 Shijie Li, Chengqi Xu, Jialun Liu
Inland waterway transportation is one of the most important means to transport cargo in rivers and canals. To facilitate autonomous navigation for ships in inland waterways, this paper proposes a data-driven approach for predictions and control of underactuated ships with unknown dynamics, which integrates model predictive control (MPC) with an iterative learning control (ILC) scheme. In each iteration
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Evaluating SLIM-based human error probability for ECDIS cybersecurity in maritime J. Navigation. (IF 2.4) Pub Date : 2022-10-05 Gizem Kayisoglu, Pelin Bolat, Kimberly Tam
There is an undeniable recognition that maritime cybersecurity risk management should involve process, technology, and people. However, thus far, most studies have focused on the technical and process aspects of maritime cybersecurity, more than on the human element. On a vessel, the Electronic Chart Display and Information System (ECDIS) is, amongst all the electronic devices on the bridge, a complex
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Navigators’ views of a collision avoidance decision support system for maritime navigation J. Navigation. (IF 2.4) Pub Date : 2022-09-29 Katie Aylward, Reto Weber, Monica Lundh, Scott N. MacKinnon, Joakim Dahlman
Maritime navigation is a complex task involving the acquisition, analysis, and interpretation of information using seamanship, professional knowledge, and technology. As the maritime industry transitions towards maritime autonomous surface ships (MASS), there is an increasing gap between the operator and the technology. This paper explores a collision avoidance decision support system for navigation
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A study of the EGM2008 model of Earth's gravitational field J. Navigation. (IF 2.4) Pub Date : 2022-09-29 Don Koks
The Earth Gravity Model 2008 (EGM2008) is now some years old, and yet information on how to use it to calculate Earth's gravity remains obscure outside the field of geodesy. We describe the mathematics necessary to implement EGM2008, and use this to discuss several points of the model: its sensitivity to the number of spherical harmonics being summed, nuances and a trap for physicists and mathematicians
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Application of elliptic integrals in marine navigation J. Navigation. (IF 2.4) Pub Date : 2022-09-15 Miljenko Petrović
If the Earth's oblateness is neglected in marine navigation, then the sphere gives a relatively simple solution for course and distance between any two points. The navigation sphere where a span of one minute of arc is equal to nautical mile is used. The primary deficiency of this approach is the lack of a closed-form formula that takes the Earth's eccentricity into account. Considering the Earth as
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A practical environment potential field modelling method for complex geometric objects J. Navigation. (IF 2.4) Pub Date : 2022-09-15 Zhongxian Zhu, Hongguang Lyu, Jundong Zhang, Yong Yin, Xiang Fan
Several studies have been conducted on collision avoidance (CA) and path planning for maritime autonomous surface ships (MASS) based on artificial potential field (APF) and electronic navigation chart (ENC) data. However, to date, accurate, highly efficient, and automatic modelling of complicated geometry environment potential fields (EPFs) has not been realised. In this study, an accurate EPF model
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A study of S-100 based product specifications from a software implementation point of view: focusing on data model representation, similar features and symbols, and ECDIS and VTS software J. Navigation. (IF 2.4) Pub Date : 2022-09-15 Seojeong Lee, Changui Lee, Geonhong Kim, Hwajin Na, Hyoseung Kim, Jeongseok Lee, Minsik Park
E-navigation provides the opportunity to apply modern digital and other electronic enhancements to improve the safety and efficiency of maritime navigation. Under the broad banner of e-navigation, the International Hydrographic Organization's S-100 product specification framework is facilitating the establishment of a standard maritime data structure to enable a free-flowing exchange of navigation
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Attention-guided lightweight generative adversarial network for low-light image enhancement in maritime video surveillance J. Navigation. (IF 2.4) Pub Date : 2022-08-30 Ryan Wen Liu, Nian Liu, Yanhong Huang, Yu Guo
Benefiting from video surveillance systems that provide real-time traffic conditions, automatic vessel detection has become an indispensable part of the maritime surveillance system. However, high-level vision tasks generally rely on high-quality images. Affected by the imaging environment, maritime images taken under poor lighting conditions easily suffer from heavy noise and colour distortion. Such
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Sea current relative navigation using interacting multiple model filter with adaptive fading technique J. Navigation. (IF 2.4) Pub Date : 2022-08-22 Jaehyuck Cha, Jeong Ho Hwang, Chan Gook Park
In this paper, we propose a sea current relative navigation method using an interacting multiple model (IMM) filter with adaptive fading technique that can compensate an inaccurate sea current dynamics model. Due to the marine environment, the underwater vehicles largely depend on inertial navigation. Unfortunately, since its performance deteriorates with time, it is usually aided by another sensor
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Use of pulsars for ship navigation: an alternative to the sextant J. Navigation. (IF 2.4) Pub Date : 2022-08-22 Janusz Adamson
A new method is proposed for determining a ship's position at sea using naturally occurring pulsar signals to provide an alternative to the sextant. Use is made of four distinct pulsar radio signals whose timing stabilities are comparable to atomic clocks and whose characteristic signatures can be used as natural radio navigation beacons. Pulse peak time difference measurements, accurate to within
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A novel pulsar-based template-independent navigation method J. Navigation. (IF 2.4) Pub Date : 2022-08-17 Zhize Li, Wei Zheng, Yusong Wang
Because of the high photon flux, the Crab nebula pulsar is widely used as the observation target for X-ray pulsar-based navigation. The built profile of the Crab pulsar will change over time, however, which means that the pre-calibrated template cannot be used for the long term. In this paper, a novel pulsar-based template-independent navigation method is proposed. The detected phase propagation model
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Detection of maritime traffic anomalies using Satellite-AIS and multisensory satellite imageries: Application to the 2021 Suez Canal obstruction J. Navigation. (IF 2.4) Pub Date : 2022-08-15 Ahmed Harun-Al-Rashid, Chan-Su Yang, Dae-Woon Shin
This study summarises the scenario of maritime traffic anomalies, like the increased congestion and U-turn of ships caused by the ship grounding in the Suez Canal in March 2021. Here, satellite automatic identification system based ship trajectories, and Sentinel-1 and Sentinel-2 images based ship positions are analysed after subdividing the study area into seas, lakes and canals. The results show
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A graph method of description of driving behaviour characteristics under the guidance of navigation prompt message J. Navigation. (IF 2.4) Pub Date : 2022-08-15 Liping Yang, Yang Bian, Xiaohua Zhao, Yiping Wu, Hao Liu, Xiaoming Liu
To verify whether a graph is suitable for describing driver behaviour performance under the effects of navigation information, this study applies two types of prompt messages: simple and detailed. The simple messages contain only direction instructions, while the detailed messages contain distance, direction, road and lane instructions. A driving simulation experiment was designed to collect the empirical
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Determination of latitude by two fixed-altitude sightings J. Navigation. (IF 2.4) Pub Date : 2022-08-08 Brian Villmoare
The use of multiple observations near noon with a traditional sextant to determine a fix is common among celestial navigators. A recent invention is the fixed-angle ‘Bris sextant’ that comes with advantages, but imposes constraints due to its invariant nature. We propose a method by which both longitude and latitude can be fixed using only two sightings with such a device, each equidistant from the
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Remote use of shiphandling simulator: BRM skill acquisition J. Navigation. (IF 2.4) Pub Date : 2022-07-28 Seta Hiroaki, Yoshino Shingo, Takashima Kyoko, Unno Teppei
Cadets training to become licensed mariners based on the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW) Code have been under pressure to keep up with the countermeasures against COVID-19 from the Spring of 2020. For several reasons, sea training voyages were restricted or cancelled, and the schooling style was drastically changed from face-to-face
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Agile collision avoidance for unmanned surface vehicles based on collision shielded model prediction control algorithm J. Navigation. (IF 2.4) Pub Date : 2022-07-18 Yihan Tao, Jialu Du
Collision avoidance (COLAV) is a prerequisite for the navigation safety of unmanned surface vehicles (USVs). Since USVs have to avoid obstacles clearly and timely, i.e. the COLAV should be agile, the COLAV algorithm should have low computation complexity and make efficient COLAV decisions. However, balancing between the computation complexity and the COLAV decision optimality is still intractable at
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A Doppler enhanced TDCP algorithm based on terrain adaptive and robust Kalman filter using a stand-alone receiver J. Navigation. (IF 2.4) Pub Date : 2022-07-05 Kefan Shao, Zengke Li, Zhehua Yang, Zan Liu, Yaowen Sun
Time-differenced carrier phase (TDCP) is a commonly used method of precise velocimetry, but when the receiver is in a dynamic or complex observation environment, the estimation accuracy is reduced. Doppler velocimetry aims at estimating instantaneous velocity, and the accuracy is restricted by the accuracy of measurement. However, in such unfavourable cases, the Doppler measurement is more reliable
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Dual-channel LIDAR searching, positioning, tracking and landing system for rotorcraft from ships at sea J. Navigation. (IF 2.4) Pub Date : 2022-07-01 Tao Zeng, Hua Wang, Xiucong Sun, Hui Li, Zhen Lu, Feifei Tong, Hao Cheng, Canlun Zheng, Mengying Zhang
To address the shortcomings of existing methods for rotorcraft searching, positioning, tracking and landing on a ship at sea, a dual-channel LIDAR searching, positioning, tracking and landing system (DCLSPTLS) is proposed in this paper, which utilises the multi-pulse laser echoes accumulation method and the physical phenomenon that the laser reflectivity of the ship deck in the near-infrared band is