The property of being navigable; navigability.(noun)
The Century Dictionary (Public Domain)
Use "navigableness" in a sentence
"All their efforts of persuasion, however, were lost upon Dr. Kirk, as he had not yet learned their language, and his leader, knowing his companion to be equally anxious with himself to solve the problem of the navigableness of Kebrabasa, was not at pains to enlighten him."
"Ottawa, the St. Maurice and the Saguenay, each of which surpasses in navigableness the largest rivers of Europe."
"Thus wrote Dr. Holmes* in the year 1800, cautiously measuring the navigableness of the stream by his own observation and the past ex - perience of others."