Dive planes ?

I thought of something today....   Instead of "regular thrusters" for the rov, what if it had the motors installed on dive planes that rotated up or down with whatever motion was necessary in order to point the prop in the right direction?   

I.e.....  To descend, the code rotates the servo that controls the dive plane do that the thruster props are pointed up at a 45* angle.... That force would push the rov down into the water... Opposite for up, and for forward the dive planes would be at 0*.  For reverse the motors would spin in reverse on the same dive planes, and also the dive planes would have to work in reverse.....     Too cool..

Getting to work on this design Asap.