https://www.kismetwireless.net
The Kismet docs can be most easily found and read at the Kismet website
The docs repository is at:
$ git clone https://www.kismetwireless.net/git/kismet-docs.git
and mirrored on Github at:
$ git clone https://www.github.com/kismetwireless/kismet-docs