To fix on something, in that sense, means to intend, or focus on, just as in navigation your attention wanders over the whole area until you get your lines down and then you are focussed on your fix...kind of like that. Or like drawing a bead on somp'n. I'm fixin' to bust that Harper's Ferry sliderule iffen ever I comes acrost it.

LOL!!

Just funnin' ya, Bobert!! I wouldn't do no such thing, and you know it full well.

A