Question

how did sailors find their way in the sea?

Answer 1

in early times, sailors used to orient themselves to the stars .In order to calculate directions ,they learnt the positions of the fixed stars which unlike other celestial bodies appeared to be always present at the same point in the night sky . with the help of simple geometric device called astrolabe , they would measure the angle between the horizon and the fixed stars at night ,and the angle between the horizon and the sun during the day