Mejora de la eficiencia en la compensación de agujas náuticas
The objective of this thesis is to improve the efficiency in the compass adjustment. First, a complete, orderly, synthetic and updated study on this matter is performed, including the state of the art, as well as the international and Spanish regulations, and then, four cases of study are considered...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/673564 |
| Acceso en línea: | http://hdl.handle.net/10803/673564 https://dx.doi.org/10.5821/dissertation-2117-363400 |
| Access Level: | acceso abierto |
| Palabra clave: | Àrees temàtiques de la UPC::Nàutica 625 68 |
| Sumario: | The objective of this thesis is to improve the efficiency in the compass adjustment. First, a complete, orderly, synthetic and updated study on this matter is performed, including the state of the art, as well as the international and Spanish regulations, and then, four cases of study are considered to be focused on: i) Obtaining a method that allows to use the information of course over ground given by the GPS, in order to create the table of the residual deviations (deviation table) in small crafts, where the unique course indicator is the magnetic compass, once the deviations have been compensated to two leading lines close to cardinal magnetic courses separated by 90º. ii) A study on the incidence of asymmetric rods d, b (which cause coefficients A, E), in order to simplify the methodology to compensate. Besides, an improvement in the accuracy of the calculation of the residual deviations is also proposed when it is compensated by following lines that do not exactly coincide with cardinal or quadrantal magnetic courses. iii) A study of the problem in the selection of the quadrantal course for creating the deviation table by the practical formula of the equation of deviation, as experience demonstrates that, from the four deviations on the quadrantal courses, there is always one that is misaligned, i.e. that gives a coefficient D different from the obtained with any of the other three. iv) Obtaining a method for adjusting and creating the deviation table with a single swing to four magnetic courses. This saves time and fuel, as well as increases the safety of ships by staying less time near the shore and other vessels. Formally, the thesis is structured in four parts. The first one is introductory, and deals on magnetism, magnetic compasses, and systems of electromagnetic units. The second part corresponds to an updated study on the fundamentals of the compass adjustment. In the third part, the state of the art in regard to research on magnetic compasses and their adjustment is described. And in the fourth part, the aforementioned cases of study are developed. Finally, conclusions are drawn. In addition, an annex with the international and Spanish regulations on magnetic compasses and their adjustment is incorporated. |
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