This is the millionth time I've come across this particular feature (maybe a bug?) wherein Civ 5 classifies something as coastline/ocean where in reality you find out that it's just a giant lake.
Why does Civ 5 do this? It gimps some AIs, such as Monty who depend on terrain being accurately depicted. Had to restart a 100 turn game in which I found out that my coastline capitol for the British (big maritime civ) was actually a large lake, effectively making my capitol useless in terms of production for ships and the like...
Rather frustrating to say the least...
Why does Civ 5 do this? It gimps some AIs, such as Monty who depend on terrain being accurately depicted. Had to restart a 100 turn game in which I found out that my coastline capitol for the British (big maritime civ) was actually a large lake, effectively making my capitol useless in terms of production for ships and the like...
Rather frustrating to say the least...