They will have to live with it for the rest of the trip now, but Alcock knows how the engine roar can make a pilot fall asleep, that the rhythm can lull a man into nodding off before he hits the waves. It is fierce work--he can feel the machine in his muscles. The sheer tug through his body. The exhaustion of the mind. Always avoiding cloud. Always looking for a line of sight. Creating any horizon possible. The brain inventing phantom turns. The inner ear balancing the angles until the only thing that can truly be trusted is the dream of getting there.