Question

what did explorer use to calculate the distance to reach their distinction​

Answer 1

Invented in China in the 3rd century BC, the compass did not come to Europe until the 12th century AD. By the time of Columbus' voyage it was common. Instead of degrees, the compass card, on which directions were drawn or printed, showed the points of the compass, including north, south, east, and west. There are 32 points of the compass, the four main quadrants of the circle each divided into eight 11¼ ° points. Columbus noticed that, as one sailed across the Atlantic Ocean, the variation between magnetic north and true north changed. On future trips he used this to predict, roughly, his arrival in Ameri

Points of the Compass

A Chip Log, a Log Line Reel, and a Sand Glass

A Chip Log, a Log Line Reel, and a Sand Glass