I heard the sundail version is the one where you push the rifle butt first in the sand or soil and when the sun hits it at 12 you mark the ground and so on then you have the clock face but you do need your watch to tell you when it is 12 so you can mark the ground lol .
That must be one of the ugliest things I have ever seen
I have no idea on the attributes, if any, of that thing.
Two words come to mind though.
Dyer Rhea