What must a diver do to resurface?

Answer 1

This question is a little vague. To answer in the simplest terms...swim to the surface at a rate of no more than one foot per second. After long dives or deep depths, divers should make a safety stop for several minutes before finally breaking the surface to be certain that the necessary amount of excess nitrogen has been expelled from the body.

Answer 2

you just kick up, its basically like swimming but you go up instead of froward