Mining ship
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The Mining Ship is a Tauron-registered ship that was designed to extract raw metals and minerals. In the fleet, it served a vital role in mining tyllium ore, which is a highly-efficient fuel for all ships once the mineral is refined.
Mining ships are very hot, dirty, cramped vessels that are not suitable as a refuge for passengers.
Mining ships have a very limited refining ability. Because of this, mining ships work in concert with a Refinery Ship, which handle the bulk of the mineral processing.
See Also
A graphical view of some of of the ships of Galactica's fleet from the official SciFi Channel web site.