A work in progress on the transport systems in the Sea of Stars:
Star Ships and Sky Ships
The Sea of Stars is fragmented into a multitude of islands ranging is size from mere specks, only large enough for a house or tree to fit upon, to vast continent-sized islands. Between the islands is the space between the stars that tumbles down into the star-filled infinity below. Naturally, this makes travel difficult.
Sea of Stars RPG Design Journal 