Harking to my first post and my enthusiasm for the reverse tear drop shape one needs to envisage in general terms what is actually happening as that shape travels through the water.
If the viscosity of the media was considerable and elastic there would be an initial material build up across the rounded nose as penetration occurrs. The maximum diamater having broached the continuum, now finds its energy in a collar of the broached media potentiating, enabling or squigging that section behind the maximum diameter ( tale of the tear drop) forwards.
As we are in water and this being incompressable, the forward movement of that shape has to result in a displacement. and this is in the direction of least resistance, which for boats will be a collar of water on the surface. It has been found that the shape and depth of this collar is so dispersed around the bow's maximum diameter to act as in recoil and not creating an energy wasteful wake.