The crew compartment of the Ark II was divided into two sections. This was mentioned in
The Ark Lords and explored in a bit more detail in
Rome's Evolution. The people in the front, referred to as "The Grays" were later revealed to be part of the
Darwin Project. The people in the back were called "The Whites" because that was the color of each sarcophagus.
Here is a picture of its overall organization (you can click on the image for a larger picture):
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The sarcophagi were stacked on the left and the right, three rows tall and three sarcophagi per row for a total of 540 people. Here is a close-up of their layout:
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Thus,
Rome's Revolution started here.