Question 1055Navigation General

The correct answer is A) group velocity. The speed at which an ocean wave system advances is called the group velocity, which is the velocity at which the overall shape or envelope of the wave system propagates. This is different from the individual wave velocity, which is the speed at which the individual waves within the wave system move. The other answer choices are incorrect because: B) ripple length is a measure of the distance between wave crests, C) wave length is the distance between consecutive wave crests, and D) wave velocity is the speed of the individual waves, not the overall wave system.