Dans cet ouvrage, l'auteur fournit des informations sur la science de la navigation, y compris les mathématiques, la géographie et la physique appliquées à la navigation. Il offre également des conseils pratiques pour les navigateurs, y compris la navigation dans des conditions météorologiques difficiles. Ce livre est utile à la fois pour les étudiants en navigation et les marins expérimentés.

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