Jack has a similar type on his #2 Liberty. Basically, It is a Bayjet bowl w/a Jacuzzi nozzle attached to it (w/a certain diameter orifice at a certain angle for optimum performance w/ his setup). He does have a reverse though.
He says that the normal Berkeley type nozzle creates a turbulence that the Jacuzzi deflector nozzle does not.
http://www.***boat.com/image_center/...53JM29-med.JPG