Largest range for vectoring to final

[the inquirer]

What is the largest range you can have your scope to vector to final? I remember it being somewhere around 150mi but can’t remember where I’ve read it. Anyone?

 

[LazyBones]

5-9-1 e. For enroute.

I’ve never seen any limitation for terminal though.

 

[32andBelow]

150 main scope 125 side scope

 

[bton]

Center vectoring on a 125 mile scope... Look out 😀