All deck plans in Highguard 2017 edition are like that.Thank you for the image and explanation, I was looking at the Scout/Courier ship plans in the Explorer's Edition (p.59) and they looked like single occupancy beds.
Where can I find more isometric ship plans like the one above?
All staterooms are, at least by tradition, capable of sleeping two. By default life support will handle it. Double occupancy does not require special staterooms.