The article in the short form presents a problem of protection of human activity in the offshore sector. Authors particularly focused on the analysis and presentation of highly specialized vessels — ERRV (Emergency Response and Rescue Vessels) which are specially designed to ensure safety in the offshore sector; their equipment and its appropriate use. Specific solutions and measures, their capabilities and limitations were presented.
Article presented below is a prelude to the process of autonomous underwater systems positioning. An article include description of positioning methods and guidelines for the operators of autonomous underwater vehicles (AUVs), concerning above mentioned process.
The company’s success depends on many factors. One of them is the ability to meet the customers’ expectations and adjust to the needs reported by market. Mathematical methods and tools are helpful in assessing demand. Forecasts should take into account all factors shaping the demand for goods and services, but they are often difficult to define, not only because of their large number, but also due to the impact of individual variables, which is difficult to determine. In many cases, the number of placed orders strongly depends on the time at which they are submitted. The needs can vary according to the time of day, week and year. Then we are dealing with the so-called seasonality, the inclusion of which is very important in the company and enables to better adapt its activity to the customers’ requirements.
This article describes the seasonality of demand in a company providing domestic and road transport services with high-tonnage vehicles. The validity of such analyses and potential benefits were indicated.
The article contains the chosen results of research on the use of energy profiles controlling the operation of a group of devices powered by a hybrid power source. The concept of using alternative energy sources allows to reduce the total weight of the power system and model its behavior during work. Modern fuel cells are characterized with a very high energy density to mass ratio [Wh/kg], and the additional cooperation of supercapacitors and lithium-ion batteries supporting their operation ensures continuous operation and the required dynamics response while maintaining a low mass of the power supply system. The author presented the general configuration of the layout model, as well as the results of tests of individual elements included in the physical implementation of the hybrid power system.
The effectiveness and efficiency of production system is a guarantee of the company’s success, especially in times of dynamic growth of trade (including online trade), as well as increasing customers’ requirements, who want to have goods always available and delivered, preferably on the day of order. A modern customer of services raises the bar high not only for production systems, but also for transport systems. Therefore, IT tools supporting the management process of all areas of its activity are implemented in enterprises. This article describes selected of them, focusing primarily on the support of production planning process.
As the use of IT systems should be preceded by deepening the knowledge of algorithms applied in them, first of all a calculation example of the use of material requirements planning procedure for complex products with a modular structure was presented, and then the characteristics of selected IT tools supporting the processes of material requirements planning and enterprise resource planning have been made.
Security of national borders requires utilization of multimedia surveillance systems automatically gathering, processing and sharing various data. The paper presents such a system developed for the Maritime Division of the Polish Border Guard within the STRADAR project. The system, apart from providing communication means, gathers data, such as map data from AIS, GPS and radar receivers, videos and photos from camera or audio from phone calls and SMS messages, from multiple mobile units and stationary points located along the coastline. All gathered data can be visualized on a multidisplay by the personnel that can dynamically select presented data and configure form of presentation. The paper describes system functionalities, its hardware and software implementation, and presents results of acceptance tests that the system have recently passed.
The paper presents results of spatial analysis of huge volume of AIS data with the goal to detect predefined maritime anomalies. The maritime anomalies analysed have been grouped into: traffic analysis, static anomalies, and loitering detection. The analysis was carried out on data describing movement of tankers worldwide in 2015, using sophisticated algorithms and technology capable of handling big data in a fast and efficient manner. The research was conducted as a follow-up of the EDA-funded SIMMO project, which resulted in a maritime surveillance system based on AIS messages enriched with data acquired from open Internet sources.
The paper presents results of research based on analysis of weather conditions during the storm front on 11th and 12th August, 2017, which has been relocated through a significant area of Poland. The front with an unprecedented force struck the infrastructure of the Academic Training Centre in the village of Czernica (ATC Czernica) on 11th August, 2017 about 23:05 CET. Due to wind impact of near-hurricane force, significant damage in the facility’s infrastructure and the biggest losses are incurred in forest resources. The data from the front passage through Gdynia was observed on a mobile meteorological station located at the Naval Academy in Gdynia. Describing the phenomenon and displaying the losses caused is one of the historical goals set before the article, because such a rapid weather phenomenon has not been recorded in the more than 50-years history of the Center in Czernica.
The article demonstrates the design process of a flux compression generator. Several armature configurations and materials have been analyzed. The influence of mechanical parameters, such as wall thickness, inner diameter of the armature or high explosive material used, on FCG performance has been estimated. The geometry of generators’ components has been optimized using the Finite Elements Method. Several generators have been built based on mathematical model and simulation results. The designed FCG’s performance has been verified during field tests. A comparison of simulation and field test results has been presented.
The need to confirm compliance with the requirements of the Polish Defence Standards, STANAGs and shipping classification societies documents poses new challenges for manufacturers and suppliers of ship’s equipment and systems. This is related to the continuous technical evolution of electronic and electrotechnical devices, especially in the field of wireless transmission and data exchange. These challenges also apply to research laboratories, which must keep up with both the technological changes of the examined objects and the updating of requirements and reference documents. It is connected with the necessity of constant development in the area of technical facilities and competences. This paper presents an overview of the currently binding requirements for devices and systems for newly built vessels, with particular regard on the area of electromagnetic compatibility. It indicates the planned trends of changes of these requirements in relation to the technical evolution of devices. Discussion with several examples of problems and challenges faced by both equipment suppliers and research laboratories engineers were presented.