How did Mercators map projection help people in 1569?

Mercator's map projection, introduced in 1569, was revolutionary because it allowed navigators to plot straight-line courses, making it easier for sailors to travel long distances across the oceans. By preserving angles, it helped ensure that compass directions were represented accurately, which was crucial for maritime navigation. This projection became instrumental in the Age of Exploration, facilitating trade and exploration by providing a more practical tool for navigation compared to earlier map types. Overall, Mercator's projection significantly advanced the field of cartography and maritime navigation.