Publisher's blurb:
Mining Station HPT-3B A.K.A. "Hephaestus Station"
The Hephaestus Station is located on the second moon of gas giant HPT-3. The moon is mostly covered by highly toxic water solution and it's volcanically highly active. There are numerous underwater volcanoes under the moon's vast ocean and around those regions highly valuable mineral can be harvested.
The station has three drone control units for operating the ore harvesters. Other machinery is mostly automated or controlled from the observation center.
There is a single air lock that is used by the station's personnel to dock the submarine that is used to transport people and supplies between the station and a huge shuttle platform floating above the station on the ocean's surface.