"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."