alb2046418

Cross-staff in navigation

Cross-staff In navigation the instrument is also called a cross-staff and was used to determine the vessel's latitude by measuring the altitude of Polaris or the sun, The Jacob's staff, when used for astronomical observations, was also referred to as a radius astronomicus.
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Título: Cross-staff in navigation
Descripción: Ver traducción automática
Cross-staff In navigation the instrument is also called a cross-staff and was used to determine the vessel's latitude by measuring the altitude of Polaris or the sun, The Jacob's staff, when used for astronomical observations, was also referred to as a radius astronomicus
Crédito: Album / Universal History Archive/Universal Images Group
Autorizaciones: ? Cesión de modelo: No - ? Cesión de propiedad: No
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Tamaño imagen: 3692 × 5214 px | 55.1 MB
Tamaño impresión: 31.3 × 44.1 cm | 1453.5 × 2052.8 in (300 dpi)