Location from Project Hail Mary by Andy Weir
Rocky's Eridian starship — three times the size of the Hail Mary, built of xenonite, and home to the last survivor of a twenty-three-member crew.
The Blip-A is a tomb and a workshop. Twenty-two of its original twenty-three crew members died of radiation sickness over forty-six Earth years in the Tau Ceti system. Rocky is the sole survivor, working alone in a ship built for a crowd, surrounded by the echoes of crewmates whose sonar-shadows have faded from the walls. The interior is incomprehensible to human senses: pitch black (no lighting system exists because no Eridian needs one), pressurized to a level that would crush a human instantly, filled with ammonia at temperatures that would cook organic tissue. Every surface is textured for echolocation navigation — Eridians read their environment through sound the way humans read it through light. Rocky built the connecting tunnel to the Hail Mary himself, engineering a pressure transition that allows two beings from radically different biologies to meet in the middle.
139 meters long — three times the Hail Mary's length. Constructed primarily of xenonite, giving it a dark, impossibly dense appearance. No windows (Eridians are blind). The interior is pressurized to 29 atmospheres of ammonia at extreme temperatures. From the outside, it looks like a massive industrial artifact — no curves, no aesthetics, just the brute engineering of a species that builds for function in absolute darkness. A xenonite tunnel connects it to the Hail Mary, allowing Rocky and Grace to meet at the boundary between their incompatible environments.
Also known as: Blip-A, Rocky's Ship