All of these, when it comes together, allows for Portugal to become a dominant maritime and colonial power early on the game. But, as you might know at this point, this is not ‘gifted’ - a player playing with Portugal has to research these advances, build these ships, and create a strong enough economic power base that allows for the exploration expeditions to take place. If succeeding in this, the potential wealth and power that could be achieved would greatly return all these initial investments made.