The Inky Dinky Spider Tracker

Yesterday, Rome, Rei and Bonnie arrived in Socal, southern California, in MINIMCOM along with Junior. Rome and Rei were able to contact their kidnapped son using their "cell phones in the head" and found out that he was OK. However, based upon the little information that Aason supplied, the same could not be said for Rome's parents and Commander Ursay. Now that they had found him, they had to formulate a rescue plan. To accomplish that, they had to actually locate their boy:

     “I know what to do,” Rei said. Then mentally, he spoke to his son. “Aason, I’m going to teach you a song. After you learn it, I want you to just sing it over and over in your head until we tell you to stop.”
     “OK, Daddy,” Aason said. There was delight in his voice.
     “Here we go,” Rei said. “After I sing a verse, you repeat it.”
     “OK.”
     “The inky dinky spider climbed up the water spout,” Rei intoned, imparting a melody on top of the lyrics.
     “What is a spider?” Aason asked.
     “It’s an insect, from Earth,” Rei answered.
     “And what means inky dinky?”
     “It means he was all black. It makes the song fun,” Rei answered.
     “And what’s a water spout?”
     “It’s a pipe that carries water from the roof to the ground. It’s just part of the song.”
     “Just like his father,” Rome muttered out loud.
     Rei laughed. “Can you try it?”
     “OK, Daddy,” Aason said. “The inky dinky spider climbed up the water spout.”
     “Great,” Rei said. “Now the next verse. Down came the rain and washed the spider out.”
     “Oh no!” Aason said. “Is he alright?”
     “It’s OK,” Rei answered. “He’ll be OK. Try it and you’ll see.”
     “Alright. Down came the rain and washed the spider out.”
     “Good,” Rei replied. “Next verse. Out came the sun and dried up all the rain.”
     Aason repeated the verse.
     “And the inky dinky spider climbed up the spout again.”
     “That’s funny, Daddy,” Aason said, laughing mentally.
     “I know, son. I want you to start singing the song in your head, over and over, until Mommy tells you you can stop.”
     “OK, Daddy,” Aason said and he started in. “The inky dinky spider…”
     “Good,” Rome said out loud. “Now Junior, just fly due west and watch the signal strength and stop after it peaks.”
     “Of course, Auntie Rome,” Junior replied through the grille.
     “Down came the rain and washed the spider out…”
     It took about 10 minutes but finally Junior spoke up. “Alright, Auntie Rome, I’m just past the peak signal,” Junior said.
     “OK,” Rome replied. “Stay there. Now MINIMCOM, you head west as well but after the signal peaks, come back around so you’re on this side of it.”
     “Easy,” replied the starship. He accelerated rapidly, heading toward the coastline.
     “Out came the sun and dried up all the rain…”
     “Got it,” MINIMCOM answered, finally. He banked around and headed east again until the signal just peaked. “Junior and I are now about equidistant from the signal peak. But we can’t triangulate.”

So they can't triangulate? There are other ways. Think Geiger counter.