The Degasi was a Mongolian ship manned by a crew of six that crashed on Planet 4546B en route to a space station. The crash occurred around a decade prior to the events of Subnautica, in identical circumstances to the Aurora.
Paul Torgal mentions in one of the PDAs that the Degasi was taking a "detour", implying it was not on its normal route and got too close and was shot down.
Three crew members of the Degasi survived the crash, these three were Paul Torgal, his son Bart Torgal, and Marguerit Maida, a hired mercenary.
Paul, Bart and Marguerit scrapped the Degasi in order to construct the Degasi Seabases found on the Floating Island. They went on to build a base in the Jellyshroom Cave, and then in the Deep Grand Reef.
Age at time of disappearance: 79
Information: Majority shareholder in the Torgal Corporation. Beneficiary of life extension technologies. Captain of the Degasi. Father of Bart Torgal. His last PDA suggests he died after the destruction of the Deep Grand Reef base, having followed lights of unknown origin.
Age at time of disappearance: 19
Information: Only child of Paul Torgal, heir to the Torgal Corporation. Beneficiary of cerebral implants. Kept the remaining Degasi crew alive after the crash by growing food. After the destruction of the Deep Grand Reef base by a Reaper Leviathan, Bart managed to survive for an unspecified amount of time, before he fled to the Floating Island base, where he made his final log in the western observatory and succumbed to Kharaa.
Age at time of disappearance: 42
Information: A mercenary hired to protect the Degasi in case of pirate attacks. Encouraged Paul and Bart to set up habitats under the surface. Very experienced, wrestled Stalkers for their teeth and injured a Reaper Leviathan to the extent that it almost died. The last mention of her stated that she was attempting to kill the Reaper that stalked her to the habitat, and was responsible for the destruction of the Deep Grand Reef Degasi Seabase.