Wyniki wyszukiwania - BazTech

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Numerical analysis of MOB manoeuvres in regard to a body suffering from hypothermia

Kulbiej E., Rosik R.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2018

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nr 54 (126)

120--126

EN

The following paper’s aim is to provide a numerical analysis of well-known man overboard (MOB) manoeuvres undertaken by vessels’ masters’ in critical situations, when a passenger or crew member falls out from a vessel. The simulation, based on a complex hydrodynamical model of a merchant ship, which compares 3 variants of this manoeuvre, shows that the Scharnov turn is the shortest and the quickest one, but the ship finishes the Anderson turn with the lowest velocity. Also, the time of the Williamson turn is short enough, to successfully finish the operation. The duration of MOB manoeuvres is likened to the results of a medical overview, with not only the duration of MOB, but also the time between falling overboard and the beginning of the manoeuvre playing a crucial role in saving a casualty’s life.

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Fundamental principles of passage planning for autonomous vessels

Wołejsza P., Kulbiej E.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2017

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nr 52 (124)

90--94

EN

This article aims to depict the fundamentals of passage planning and route management for an autonomous vessels (AV). It presents a derivation of such a voyage passage plan, its step-by-step analysis, and a comparison to its conventional equivalent. This passage plan consists of four major parts: dock and harbour, en route, approach, and mooring stages. The whole activity of passage planning itself may be divided into the following stages: appraisal, planning, execution, and monitoring. The paper concludes with an overview of potential future applications and use of mentioned content.

3

Relevance of the relativistic effects in satellite navigation

Kulbiej E.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2016

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nr 47 (119)

85--90

EN

Position determination of Global Navigation Satellite Systems (GNSS) depends on the stability and accuracy of the measured time. However, since satellite vehicles (SVs) travel at velocities significantly larger than the receivers and, more importantly, the electromagnetic impulses propagate through changing gravitational potentials, enormous errors stemming from relativity-based clock offsets would cause a position error of about 11 km to be accumulated after one day. Based on the premise of the constancy of light, two major relativistic effects are described: time dilation and gravitational-frequency shift. Following the individual interests of the author, formulas of both are scrupulously derived from general- and special-relativity theory principles; moreover, in the penultimate section, the equations are used to calculate the author’s own numerical values of the studied parameters for various GNSSs and one Land Navigation Satellite System (LNSS).

4

An analysis of possibilities how the collision between m/v "Baltic Ace" and m/v "Corvus J" could have been avoided

Kulbiej E., Wołejsza P.

Annual of Navigation

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2016

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No. 23

121--134

EN

The report presents the simulation results of collision between m/v "Baltic Ace" and m/v "Corvus J". The analysis was performed by means of navigation decision support system (NDSS) in collision situations. This system (NAVDEC) works out anti-collision manoeuvre using AIS (Automatic Identification System) and ARPA (Automatic Radar Plotting Aids) data. Then they are processed by specialized computing algorithms and presented to the operator on a display in the alphanumeric and graphic forms. The data on the specific navigational situation from the report of Bahamas Maritime Authority was used for the generation of signals transmitted to NDSS as a sequence of NMEA strings.

PL

Celem artykułu jest zaprezentowanie wyników symulacji przebiegu kolizji pomiędzy m/v „Baltic Ace” oraz m/v „Corvus J”. Analiza została przeprowadzona przy użyciu nawigacyjnego systemu wspomagania decyzji (NDSS) w sytuacji kolizyjnej. System ten wypracowuje propozycje manewru antykolizyjnego przy użyciu danych z AIS (system automatycznej identyfikacji) oraz ARPA (system automatycznego kreślenia nakresów radarowych). Następnie propozycje te są przekazywane użytkownikowi w formie graficznych rozet i danych alfanumerycznych. Informacje wykorzystane do analizy tej szczególnej sytuacji nautycznej zostały zaadaptowane z raportu Bahamas Maritime Authority jako ciąg sekwencji protokołu NMEA.