So, the interference of the waves will either increase the resistance or decrease the resistance, or it may not matter- any of these can happen. This interference will depend on the speed of the ship. Now, when the wave is moving forward the ship is moving forward, since it is generating waves as it moves forward the transverse waves will have a velocity equal to the velocity of the ship therefore, the transverse wave length, wave length of transverse wave will be equal to two pi v square by g where v is the speed of the ship. You imagine, this is my ship, these are the transverse waves, these waves will move at the same speed as a ship. And the divergent waves, let us take the divergent waves, how will this move? This will also, the axial component of velocity will be same as that of the ship, otherwise they cannot keep on getting generated and you cannot, you will not see the waves as if they are moving along with the ship, is it not?