"Regulations require that I report this," Petrov noted. "Even though the instruments show safe levels."

"Your adherence to the rules is noted, Comrade Doctor. You have acted correctly," Ramius said. "And now regulations stipulate that we make yet another check. Melekhin, I want you and Borodin to do it personally. First check the radiation instruments themselves. If they are working properly, we will be certain that the badges are defective—or have been tampered with. If so, my report on this incident will demand someone's head." It was not unknown for drunken shipyard workers to be sent to the gulag. "Comrades, in my opinion there is nothing at all to concern us. If there were a leak, Comrade Melekhin would have discovered it days ago. So. We all have work to do."

They were all back in the wardroom half an hour later. Passing crewmen noticed this, and already the whispering started.

"Comrades," Melekhin announced, "we have a major problem."

The officers, especially the younger ones, looked a little pale. On the table was a Geiger counter stripped into a score of small parts. Next to it was a radiation detector taken off the reactor room bulkhead, its inspection cover removed.

"Sabotage," Melekhin hissed. It was a word fearsome enough to make any Soviet citizen shudder. The room went deathly still, and Ramius noted that Svyadov was holding his face under rigid control.

"Comrades, mechanically speaking these instruments are quite simple. As you know, this counter has ten different settings. We can choose from ten sensitivity ranges, using the same instrument to detect a minor leak or to quantify a major one. We do that by dialing this selector, which engages one of ten electrical resistors of increasing value. A child could design this, or maintain and repair it." The chief enginer tapped the underside of the selector dial. "In this case the proper resistors have been clipped off, and new ones soldered on. Settings one to eight have the same impedance value. All of our counters were inspected by the same dockyard technician three days before we sailed. Here is his inspection sheet." Melekhin tossed it on the table contemptuously.

"Either he or another spy sabotaged this and all the other counters I've looked at. It would have taken a skilled man no more than an hour. In the case of this instrument." The engineer turned the fixed detector over. "You see that the electrical parts have been disconnected, except for the test circuit, which was rewired. Borodin and I removed this from the forward bulkhead. This is skilled work; whoever did this is no amateur. I believe that an imperialist agent has sabotaged our ship. First he disabled our radiation monitor instruments, then he probably arranged a low-level leak in our hot piping. It would appear, comrades, that Comrade Petrov was correct. We may have a leak. My apologies, Doctor."

Petrov nodded jerkily. Compliments like this he could easily forego.

"Total exposure, Comrade Petrov?" Ramius asked.