I play continents+. Compare water scouting options: Work boats - 5 movement, 40 hammers, can temporarily traverse ocean, can share a tile with other civs' military units, can't defend themselves but are generally lowest priority targets / will not be attacked at all, does not cost military unit supply Trireme - 4 movement, 90 hammers, can temporarily traverse ocean, can't share a tile with other civs' military units Scout/other land unit - 3 movement, cannot traverse ocean, 1 sight range, can hop off and claim goody huts, sitting duck if hit by barbarians at sea. You can generally find most of the continents and civs with 2 workboats. I find them vastly superior to the other options when exploring by sea. Seems a bit too good and also unrealistic. In my current game, I scouted the entire Persian coast while he was at war with me - Persia had plenty of chances to just eat up my work boat. Seems like work boats need to be attacked more, and maybe either lose some movement points or lose the ability to traverse ocean.