To be honest, the spell that allows you to raise land from water is a far simpler and less time consuming way to move to a distant landmass.  I had such heartburn trying to build a harbor in the right place, get troops loaded on a boat and then unload them in an acceptable tile, that I never used this "feature" a second time. 

Yes, and raise land, lower land spell works way better....

Arr, I hate the sea and everything in it.

Just wait for the Seafarers of Elemental to come out.