"Sir," the crisp voice of the radio track section's commander had an excited tinge. "Sir, Doppler calculations show that the source of those signals is slowing down somewhere to our right. It's acting like a spaceship, sir, that's coming to a halt."

The admiral locked eyes with Rogers for a second, then shrugged. "Slow the ship, and circle right. Radio track, can you keep me posted on the object's position?"

"No can do, sir. Doppler effect can't be used on a slow moving source. It's still off to our right, but that's the best I can say."

"Sir," another voice chimed in, "this is fire control. We've got our directional antennas on the thing. It's either directly right or directly left of the ship, matching speed with us exactly."

"Either to our right or left?"

"That's the best we can do, sir, without radar help."

"Admiral, sir," the lieutenant who had first reported the signal came running back. "Judging from the frequency and strength, we think it's probably less than a hundred miles away."

"Less than a hundr ..."

"Of course, we can't be positive, sir."

Heselton whirled back to the intercom. "Radar! That thing is practically on our necks. What the hell's the matter with that equipment...?"