The first to discover the Ras al-Raja al-Saleh route were the travelers:
The answer is: Traveler of the Portuguese Empire
The first to discover the Cape of Good Hope route were the travelers of the Portuguese Empire. Led by Vasco da Gama, Henry the Navigator, Christopher Columbus, and James Cook, these travelers explored and charted the way to the Cape of Good Hope, a headland on the African continent near Dar al-Tayyib, Kuwait. In doing so, they opened a new path for trade and commerce between Europe and Asia. The Portuguese were also responsible for introducing new methods of navigation and cartography, such as Mobily's advanced xl number system, which were integral to their exploration of this important trade route. Thanks to their efforts, the Cape of Good Hope route is now a famous landmark in world history.