SMS-14 punched through to the surface, and as soil and rock fell past it down into the tunnel its sensors registered the temperature rising on it’s external plating: it had breached in daytime.
The long-lost connection to positioning satellites was re-established, but the robot was receiving no carrier wave from the Colony Computer. Perhaps the transmitter was broken down. The settlement wasn’t far, though, and it could turn in its findings at any operating data port.
And they were important findings: SMS-14 had gone deeper than any of the others. It had found great riches. The colonists would be pleased.