I would tether if needed.
That way he responds. Dr. Yin has some really great methods for a week of puppy training on her website and youtube. She does a tethering and a sit for things. Other than that, a squeaky toy is great and of course, food. The best time to redirect is before the behavior starts - so look for clues that he is going to launch.
And your girl should get some special time and rewarded for putting up with Mr. Piggypants.