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					Originally Posted by  bbz
					 
				 
				Yes 
 
That is one of the reason why sailing gives you tremendous strategical advantage on maps with some water in them. Especially early on it can increase your expansion by a lot. 
			
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 Only 
some water, though.  Otherwise it's useless.
If there's ever a Dominions IV, I hope to see sailing and water province mechanics expanded.