There are symbols that appear to be numbers, corresponding with text! It seems to be a log of what people do throughout the day. Certain repeating symbols do coordinate with the beginning of the day, versus the end of the day -- so you can probably gather that the people on this ship tried to make as normal a "schedule" as possible, given there is no differentiation between night and day, here. There seems to be a set hour in the middle of the day that corresponds amongst all of them -- maybe for meals, or leisure? But other than that, it's hard to decipher content.