|
nautical circle: generic term for a circular mathematical instrument of use in navigation, but likely to carry a range of mathematical and astronomical scales.
|
nautical hemisphere: a combination of graduated arcs and circles used for navigational calculations, see article on the nautical hemisphere.
|
navicula dial: type of altitude dial in the shape of a ship.
|
nocturnal: instrument for finding the time at night from the orientation of the stars, see article on the nocturnal.
|
nocturnal and quadrant: compound instrument which combines both the functions of a nocturnal and quadrant, usually on two different sides of the same instrument, with equal importance given to each.
|
