octant

The arc was extended from an octant to a sextant and a stout handle was added at the back of the instrument.
L'arc a été portée de un octant à un sextant et une solide poignée a été ajouté à l'arrière de l'instrument.
Mr Hadley tells us, that upon trial of one of these instruments, three observations made at sea of the distance between two stars with a brass octant of this kind differed from Mr Flamsteed 's at land, only about a minute.
M. Hadley nous dit que, lors de procès de l'un de ces instruments, trois observations faites en mer de la distance entre deux étoiles en laiton avec un octant de ce type différent de M. Flamsteed 's à la terre, seulement environ une minute.
The museum has both a sextant and an octant.
Le musée possède à la fois un sextant et un octant.
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