"But they make it more difficult to get a good fix on what's happening."
We managed to get a good fix on their position, and a course projection.
Since nobody has a good fix on what the number is going to be, you just don't take a position.
My guess is that our man has got a pretty good fix in with the police.
Seemingly he'd managed to get a good fix from the sun.
Do you still have a good fix on his transmission signal?
They don't want you to get a good fix.
Which is like a man who has a good fix on the pot at the end of the rainbow.
Only after entering the maze did she get a good fix on the sound.
"We have found what we feel is a good fix."