Pascual de Iriarte was directing an expedition in the late 17th century tasked with exploring the southern seas around the Strait of Magellan. On February 17, 1676, a tragic incident occurred at the Evangelistas Islets, which form part of the treacherous waters at the western end of the strait. This remote area was characterized by unpredictable weather, dangerous currents, and uncharted landmasses that often posed risks to navigating crews. During the course of the mission, sixteen members of Iriarte's crew went missing under mysterious circumstances, triggering an immediate search operation. Unfortunately, no trace of the lost men was ever found.

The loss of these sixteen individuals was a significant blow to the expedition. The fate of the crew remained uncertain, leading to various theories ranging from accidental drowning to possible encounters with indigenous populations or unforeseen maritime hazards. The incident also highlighted the perilous nature of exploration during this era, a time when European powers, particularly Spain, were eager to expand their territorial claims and knowledge of the New World. As Iriarte continued his journey, the memory of the lost men served as a somber reminder of the risks and sacrifices faced by explorers.

Navigating the Strait of Magellan was a complex undertaking due to its intricate geography and the changing tides, yet it was essential for gaining access to the Pacific Ocean from the Atlantic. The disappearance of the crew at the Evangelistas Islets not only underscored the dangers of maritime exploration during this time but also sparked discussions about the need for better safety protocols for such undertakings in the future. It contributed to evolving strategies and approaches towards navigation in the region, paving the way for more efficient exploration efforts in the coming years.