Introduction:
The narrator states that we are going to duplicate the voyage in order to emphasize the intention of recreating a historic journey. The first voyage mentioned here is the voyage of Christopher Columbus, undertaken in 1492.

Christopher Columbus's First Voyage:
- Christopher Columbus, an Italian explorer, embarked on his first voyage in 1492 with the aim of finding a new trade route to the East Indies by sailing westward.
- Columbus convinced King Ferdinand and Queen Isabella of Spain to sponsor his voyage, and he set sail with three ships: the Santa Maria, the Pinta, and the Niña.
- On August 3, 1492, Columbus and his crew departed from Palos de la Frontera, Spain, and headed towards the unknown territories of the Atlantic Ocean.
- After a long and arduous journey, on October 12, 1492, Columbus and his crew finally reached land, which is believed to be present-day Bahamas in the Caribbean.
- Columbus continued his exploration of the Caribbean islands, visiting other islands such as Cuba and Hispaniola (now Haiti and the Dominican Republic).
- The first voyage of Christopher Columbus marked the beginning of European exploration and colonization of the Americas. It opened up new trade routes, expanded geographical knowledge, and had a profound impact on the history of the world.

Reasons for Duplicating the Voyage:
1. Historical significance: Duplicating the voyage allows us to relive and understand the challenges, discoveries, and impact of Columbus's journey. It provides an opportunity to experience history firsthand.
2. Research and documentation: By duplicating the voyage, researchers and historians can gather valuable data, study the navigation methods used by Columbus, and document any changes in the landscape or environment over time.
3. Educational purposes: Recreating the voyage provides an educational experience for students and the general public, helping them to gain a deeper understanding of the explorations that shaped the world we live in.
4. Commemoration: Duplicating the voyage serves as a tribute to the courage and determination of Christopher Columbus and his crew, honoring their achievements and contributions to world history.

Conclusion:
The narrator mentions duplicating the voyage to highlight the significance of retracing Christopher Columbus's first voyage. By recreating this historic journey, we can gain insights into the past, conduct research, educate others, and commemorate the explorers who paved the way for future discoveries.