The UNSC In Perfect Weather (FFG 819) was a guided missile frigate of the UNSC Navy. In December 2553, it would be temporarily reassigned by directives from the highest authorities to the UNSC Office of Naval Intelligence, and it would be responsible for ferrying Section Three Commander Greenberg and new ONI Lieutenant Lauryn Alden from Thebes, Alpha Centauri System to Earth at flank speed. However, Greenberg would instruct the In Perfect Weather to take a leisurely approach in the Sol System, dropping out from the extradimensional space at the Charon Slipspace Observations Array and making an eighteen-hour trip in-system to give the young Alden a chance to see the stellar and lovely "Six Wonders of the Solar System", sights designed to impress Lauryn of her newfound station.