Oxygen converter

An oxygen converter was a part of the life support system on mag-lev carriages servicing a Nezu colony planet. Each carriage came with an unknown, but plural, number of converters. Some of them, along with the induction coils, had been damaged on the carriage that Neelix named Alixia. Because the damaged converters were never properly repaired prior to Alixia's ascent – and because at least one was damaged during their unexpected liftoff – the oxygen levels on the carriage were severely compromised throughout the journey. Alixia's passengers – save for the physically superior Tuvok – experienced near oxygen-deprivation as she rose through the atmosphere.