WORLD HISTORY

Detailed explanation-1: -The only navigation they had was a sextant, which uses the angle between the sun (or star) and the horizon (constantly bouncing up and down due to strong Antarctic waves) to calculate latitude.

Detailed explanation-2: -By measuring the distance of the sun and stars above the horizon, the astrolabe helped determine latitude, an important tool in navigation. Another tool, the magnetic compass, which had been invented in the twelfth century, was improved upon during the Renaissance.

Detailed explanation-3: -The mariner’s astrolabe was a simplified version of an instrument originally developed by Arab astronomers for measuring the height of heavenly bodies above the horizon and came into use in navigation by about 1470.

Detailed explanation-4: -The inventions of the compass and astrolabe allowed sailors to sail at night using the stars. The invention of a weapon that was used against the different monsters and creatures that were in the ocean waters.

Detailed explanation-5: -The magnetic compass relies on the magnetic pull from the magnetic north pole, and was a tool that the explorers acquired from China. Simply put, it was a vital invention that was crucial for sailors to know in which direction they were going, which made for a more efficient and safer voyage.