1 янв 1730 г. - [1730] John Hadley invents the octant.
Описание:
The octant is a measuring instrument that would be aligned with the horizon to greatly assist with navigation. It reflects two images together, usually the sun and the horizon to determine the latitude at sea.Добавлено на ленту времени:
Дата:
1 янв 1730 г.
Сейчас
~ 296 г назад