The correct answer is A) into the seas. In heavy seas, the proper technique for steering a survival craft is to steer the craft into the waves, also known as "heading into the seas." This allows the survival craft to ride up and over the waves, providing the most stable and controlled movement. Steering broadside to the seas (B) or in the same direction as the seas (C) would make the craft more vulnerable to being swamped or capsized by the waves. Steering in a series of figure-eights (D) is not a recommended technique for heavy seas and would be less effective than heading directly into the waves.