How it works
How does an astrolabe work?
It worked by rotating a map of the night over a plate.
What was an cross-staff used for?
It was used for calculating the time of day.
How did a rudder work?
It worked by using preasure to move the stern.
What was a compass used for?
It was used for finding North.
It worked by loadstone pointing North.
What was a rudder used for?
It was used for steering a ship.
How did a cross-staff work?
It worked by alligning the staff with the horizon.
What was an astrolabe used for?
It was used for calculating the locations of stars.