"It's a signal from Bud!" Zimby exclaimed.
Tom nodded grimly. "He's spotted trouble—probably an enemy sub." Silence settled over the cabin as Tom reached out to switch on the antisonar circuits.
At that same instant a red light flashed on the control panel. "The Damonscope!" Tom cried out. "We may be over the Jupiter prober!"
Cutting off the steering jets, Tom gave a brief flick on the reverse jets to halt the craft. Then he turned over the controls to Zimby and began stripping down to don a hydrolung suit.
"Gallopin' guppies! What're you aimin' to do?" Chow exploded.
"Go out and look for that missile," Tom said calmly. "It's what we came for."
"Are you loco, boss? What about that sub Bud just spotted? Mebbe it's Mirov's bunch!"
Tom refused to be dissuaded. After swallowing a space-plant pill, he armed himself with an underwater flashlight.
"Think it's safe to show that light, skipper?" a crewman asked uneasily.