Are you Sure...
Never done Zig Fishing so will be interested to read this thread
I reckon so yeah, as people have said above all it is, is a surface system set up but with a lead attached... creating an anchor point of which will allow you to pull the inteceptor (or float) under to the desired distance.
Its something i personally have just thought of, so i dont know for sure whether itll work, but from what members have said above it could and would. Worth giving a bash if you ask me.