Many ship accidents have arisen from an error in course indication. Bearing in mind that the actual errors in gyrocompass and satellite compass are really minor, they may be considered valid to be input into an autopilot provided that any failure in such devices is controlled by means of a secondary heading source such as a magnetic compass. However, magnetic compass deviation may be significant and its heading should be corrected before being input to the autopilot. The errors caused by the geographic variability of the deviation should also be taken into account. Moreover, the current way to reduce the deviation requires that the ship is un-berthed to execute a complete swing. The aim of this article is to obtain a ship magnetic model by means of an algorithm based on least squares to correct magnetic compass heading input in the autopilot and to permit definitive magnetic compass compensation without swinging the ship through 360°.

Campus Virtual de la Universidad del País Vasco. C/ Barrio Sarriena s/n 48940 Leioa (Vizcaya) Tlfn: +034 946012255Email: pulsar@ehu.es ResumenEn el presente artículo se realiza una descripción y comentario de las aportaciones más relevantes que se han realizado en sobre el fenómeno de los "nativos digitales" o "Net Generation". Se recogen distintas posiciones sobre el desarrollo de nuevas habilidades cognitivas y nuevas tareas y necesidades de estas nuevas generaciones afectadas por el cambio tecnológico, así como sus implicaciones para las políticas educativas y prácticas docentes. Palabras clave Aprendizaje, videojuegos, identidad, redes sociales, nativos digitalesKey Words Learning, videogames, identity, social networks, digital natives Abstract This paper brings a description and some comments about the more relevant contributions made to literature about the subject of "digital natives" or the "Net Generation". We explain the different positions emerged on the development of new cognitive skills or the newer generations' tasks and needs, along with a discussion about related issues for educational policies and teaching practices

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