The Charlie Horse Gambit, part 1

Yesterday, we saw Rome set up Captain Keller so that he would allow her to fly a circumpolar route along the line of longitude where the Overmind determined Aason was being held captive. As they are coming south from the North Pole, Rome needs to create yet another ruse so that she can use her mind to finalize the triangulation:

     “Rei,” Rome called out. “Be ready to come up to the cockpit. I need to work with the Overmind and they think someone needs to pilot the ship.”
     “Whatever you say,” Rei answered.
     As soon as they crossed over the Arctic Circle into the continent proper, Rome yelled out loud, “Ow!”
     She unclasped her belt and threw herself on the ground, grabbing the back of her leg and howling in agony. “Ow, ow, ow,” she said.
     Ionelli raced over to her. “What’s the matter,” he asked.
     “Cramp,” she moaned, “ow, ow.” She grimaced. “Quick,” she said, “get Rei. Ow, he can pilot the rest of the ow, ow.” Rome thrashed around on the floor convincingly.
     “Bierak,” Ionelli shouted out, “Get up here.”
     Rei came racing through the cockpit arch. Upon seeing Rome writhing around in pain, he shoved Ionelli out of the way and knelt down by his wife. “Romey, what’s the matter?” he asked.
     “Cramp,” she moaned. “You know.”
     “Straighten your leg out,” Rei said. “And point your toes forward. That always helps you.”
     “I’ll be alright,” Rome gasped. “Pilot the ship. I put a marker on our destination. I just need to let the muscle stop spasming.”
     “Are you sure?” Rei asked, feigning concern.
     “Yes,” Rome replied.
     Rei stood up and walked around to the pilot’s seat. He sat down and buckled himself in. He grasped the joysticks firmly and banked gently to the right. The central display showed him the proper vector. This part was easy.
     Rome was rubbing the back of her thigh with her hand, trying to knead the muscles to calm her fake Charlie horse.
     “Aason?” she asked.
     “Yes, Mommy?”
     “Overmind?”
     “I am on it,” the entity answered.

OK. The pieces are in place. Now it is up to the Overmind to identify Aason's exact location.