QUADRANT
each of four quarters of a circle.
an instrument used for taking angular measurements of altitude in astronomy and navigation, typically consisting of a graduated quarter circle and a sighting mechanism.
a frame fixed to the head of a ship's rudder, to which the steering mechanism is attached.
an instrument used for taking angular measurements of altitude in astronomy and navigation, typically consisting of a graduated quarter circle and a sighting mechanism.
a frame fixed to the head of a ship's rudder, to which the steering mechanism is attached.