The Skyfall Chronicles
The ruins of Alpha were actually discovered when one of the pirate airships had to make a crash landing after a skirmish with a flotilla war galley. The surviving crew members spent a week repairing the ship before they were able to return to the surface to report the find. Shortly after this it was decided that this rock, deemed “Alpha One” by the Mage’s Guild (only the bureaucrats call it this these days), was turned into the primary base for the pirate’s organization. Alpha is neither the largest nor the most fortified of the pirate bases, but it is one of the most diverse because, due to it’s proximity to the center of the maelstrom, it is often used as a mid-way point when traveling from stronghold to stronghold.