Examples from the Web for nav
Historical Examples of nav
Can't you persuade this girl of ours to give up the co-ed plan back yonder in Annapolis,—she knows all the seamanship and nav.Peggy Stewart at School
Gabrielle E. Jackson
In either case popular imagination pictured the nav a long distance away.An Introduction to Mythology
If nav was a ship at all, I am at a loss to know why it should be "a much older term."