The Flying Ships
This article refers to Inferno Ascended.
The Imperial Messenger Ships are considered the fastest ships in Stygia. Hence, the epythome 'Flying Ships'.
The current Emperor decreeted that some war ships from the extincts Pharysian Death Fleet and Scout Cloud should be incorporated to the Imperial Navy. Due to their special building, with lots of foreigner Vselys and Steam People technology, those ships were able to travel faster than conventional biremes or triremes.
Some of those ships suffered remodelling to remove any 'hazardous' technology not endorsed by the Empire.
A famous Imperial Messenger Ship is the Medeia.