Of course he had quite a bit of air, both bottled and revitalized from the greenery in the hold. But the greenery was none too healthy and the bottled goods was almost gone. His compressor could have been made to work and Paul could have made it to the station, but for what? To stand there and die? Or to die along the route in a leaky suit? Breaking into a fort was no more problem than breaching a relay station from the ground. They had been built to last for years against wind, erosion, burglars, pirates, and/or the pressures of the inner air against airless planets such as this. But Paul's problem was not merely escape. He might have tried to make the relay station if this place offered any hope. Even then, Paul might have been able as a last-ditch measure, to break into the relay station somehow. Assuming that he could break into the station, that would let the air out. The only way one could break into such a station without letting the air out would be through the airlock, and breaking into that sort of bank-vault construction was no easier than cracking the wall without letting the air out. The nearest radio receiving set was five light years away at Neosol, and if he could beam the radio call, it would take five years-- He looked at the Z-wave equipment and thought. Could it--? Whatever the rest of the universe thought about Paul Grayson and his idea about the Z-wave, Paul still had faith. Furthermore he knew as much about Z-wave gear as any other man alive, up to and including Haedaecker himself. Evans said that the Z-wave wouldn't work; how bad could they foul Z-wave equipment? Could they foul the junk so bad that Paul wouldn't be able to make repair? Or would they-- Paul tried the radio. Naturally it was silent. But it was not dead. It gave a rattle of cosmic static. Four thundering blasts came in across the ultra-short wave band, four of the beacon's outgoing transmitters unmodulated, directed at other stations across space to the nearer stars. He tried listening along the frequencies of the local oscillators of the receiving sets set to collect any incoming beacons but he realized that they would not be turned on yet; there was a point in keeping the transmitters on, but there was no use in turning on a receiver four or five years before the signal got there. He hit another transmitter and as he listened to the unmodulated signal, it began to pip in a timing-signal sequence that some technician would use five to fifteen--or more--years from now when it arrived at some other star-station. They had not fouled the radio. But that was like letting a prisoner on Antarctica keep his hearing-aid. Not worth a damn for helping him escape.