Latitude
A Cross Staff and a Quadrant are Instruments that measure Latitude.
The least count of a cross staff is typically around 0.5 degrees. This means that it can measure angles with a precision of about half a degree.
A cross staff is a navigational instrument used to measure angles, typically for celestial navigation, by aligning a crosspiece with an object in the sky. An astrolabe is a historical instrument used to observe and measure the positions of stars and planets. It was used for navigation, timekeeping, and astrology.
a cross staff
The cross staff was used to determine the vessels latitude by measuring the altitude of Polaris or the Sun.
used to draw things
2010
used to draw things
The cross staff was important in navigation during the late Middle Ages and the Renaissance because it allowed sailors to measure the angle of celestial bodies above the horizon. This tool enabled navigators to determine their latitude with greater accuracy while at sea. By aligning the cross staff with the celestial object and the horizon, sailors could take reliable readings, which significantly improved maritime navigation and exploration. Its use laid the groundwork for more advanced navigational instruments that followed.
Your staff loved you.
At the point where the rails cross.
The papal staff is called a ferula. It is a staff which is topped by a cross. Bishops carry a staff with a curved top which is called a crozier.