He referred to the fact that Endurance was about to shed 99 percent of her mass, which meant that the same complement of engines, producing the same thrust, could make her accelerate a hundred times faster. The gee forces still would not be extreme—well within the range that humans could tolerate—but the maneuver would impose stresses on the ship’s frame the likes of which it had never experienced before. This was another of those eventualities that they had foreseen long ago and built into Endurance before covering her with ice.