Lawyers don't really think about these things in the same way that mathematicians do: https://en.wikipedia.org/wiki/Thalweg#Thalweg_principle https://en.wikipe

Lawyers don't really think about these things in the same way that mathematicians do: https://en.wikipedia.org/wiki/Thalweg#Thalweg_principle https://en.wikipedia.org/wiki/Thalweg#Thalweg_principle > The Treaty of Versailles, for example, specifies that "In the case of boundaries which are defined by a navigable waterway" the boundary is to follow "the median line of the principal channel of navigation."