Definition of "unguided"

My unguided tour through the humanities would likely be unbalanced, but I hoped that this could be made up for by the sheer number of books read.

1977, Philip McCord Morse, In at the Beginnings: A Physicist's Life, page 33

Genie was an unguided missile. Since it was armed with a nuclear warhead, accuracy was not really necessary […]

1998, Turner Publishing Company, Air Force Missileers, page 13