Last modified on 20 June 2013, at 21:09

head of navigation

EnglishEdit

NounEdit

head of navigation (uncountable)

  1. (nautical) The farthest point above the mouth of a river that can be navigated by ships. This term can be somewhat subjective on many streams, as this point may vary greatly with the size of the ship being contemplated for navigation. On others it is quite objective, being caused by a waterfall, dam or lock.