The idea is to get the line moving so you can deliver the fly right into the center of activity when the fish pop up, and give the fly a chance to sink below the surface a bit. The trick is to have a helmsman who has also experienced what it's like being on the casting deck and having to make crazy casts in different directions. The idea is to anticipate which direction the fish were heading and where they will pop up next (based on which way they appeared to be travelling when they last popped up). Then head the boat in that direction with the bow headed at a 45 degree angle to the school and toward the boil. The angler can then decide if he wants to drop his back cast to starboard or his forward cast to port (assuming the angler is casting righty) and depending on where the fish appear. The other important thing for the helmsman to remember is to put the boat into neutral before getting too close to the school. This helps eliminate spooking the fish and slows the boat so the angler
can get his cast off without drifting over the line.
In my opinion you don't really need to strip the fly at all, especially if you land it in the middle of the boil; Just keep the line tight and the fish should pick it up.