While writing a blog recently about my personal frustrations with the way that Civ games handle difficulty levels (http://www.megabearsfan.net/post/2017/06/03/Frustrations-with-Civ-difficulty-levels.aspx), I came up with an idea for possibly padding out the naval tech line and limiting the ability (for civs like England and Norway) to rush to the Renaissance in 600 BC via Cartography. I'm thinking that there should be a new medieval technology in between Ship Building and Cartography. I have two suggestions for what this tech could be: Optics = Allows construction of Explorer recon unit (scout upgrade), and maybe a new medieval naval unit. Lateen Sail = Allows construction of Caravel (and/or another medieval naval unit). "Wait a minute", you might say, "Caravels are already unlocked by Cartography. Do you want naval units crossing the ocean in medieval?" Well, one of the new rules for Civ VI is that naval units do not possess the ability to cross ocean. That ability is granted exclusively by the Cartography tech (pending some new unique unit with that ability). So if Caravels are moved to be earlier than Cartography, then you'd have Caravels that can't cross ocean yet. This can already happen if you get to Mercantilism early, as you can potentially build Privateers that can't cross oceans. I do think that if the Caravel is moved out of Cartography, then something else should be put there to replace it. I don't like having a tech that only unlocks the ability to cross ocean. Perhaps the Explorer unit proposed above could be placed in Cartography if the Caravel is moved up to Lateen Sail? Either technology could also have Military Tactics as a prereq, thus further padding out the distance between Ship Building and Cartography. What does the community think?