A. a compass

Explanation

The compass was an essential navigational tool for explorers throughout history because it allowed them to orient themselves in unfamiliar environments, chart a course in an unknown area, and determine their direction and location. The compass was often used in conjunction with a map to plot a course and find their destination. The earliest compasses were believed to have been used by the Chinese as far back as the 11th century, and over time, the design and materials used in compasses have been refined and improved, resulting in the modern compasses we use today.

The compass is a valuable tool for navigation because it helps explorers to find their way in unfamiliar environments, even when they don’t have access to traditional navigation tools such as maps or GPS devices. Without a compass, explorers would have had a difficult time navigating the seas, rivers, and lands, and this could have led to disastrous outcomes.

In addition, the compass is an important tool for navigation that is often used in conjunction with other navigational tools such as maps and GPS devices. By using the compass in combination with other tools, explorers can accurately plot a course and reach their destination safely. Furthermore, the compass can be used to determine one’s direction and location even when other navigational tools are not available.

In conclusion, the compass was an essential navigational tool for explorers throughout history and continues to be an important tool for navigation today. Without the compass, the exploration of new lands and seas would have been much more difficult and dangerous. Therefore, it is important to understand the importance of the compass and how it has been used over the centuries.