Frelance, you win friendship points for recognising the Traveller deckplan... :)<br/><br/>The Void was originally a supplement for Traveller called Chthonian Stars, you can still buy the pdf for it on drivethru. It's great, though when I ran it in the past characters ended up with loads of credits and so would be walking one-person armys, so the baddies could never really be credible threats. The devs took notice of this and so the Wealth system solved that issue by keeping things to a minimum and I think the new original system used now makes characters feel more capable. However the original has a lot more setting and tech details, though I'm solving these thanks to my experience with the older game. :)<br/><br/><hr/><br/><strong>Pianoman;</strong><br/><br/>If you look at the outer pic that Ghostraven posted, the Gravity Ring is a literal ring that wraps around the ship (and it spins also when out in space, consider the turning ring of the Serenity). There is no artificial gravity generator (outside of the Dead Space magnetic floor plates of the ship), so a ring around the ship spins at a high speed and makes a kind of gravity to those within it. There is a doorway that opens to the axis of this ring, within is ladder that connects to the main body of the ship.<br/><br/>The deckplan of the Ring is the hoop as if cut and spread out. When you reach the one end if you walked it, you'd end up at the other end in a continual loop. The ship in 2001:A Space Oddysey has a small gravity ring, there is a scene in the film of the main character jogging along it and you can see they're running along a large hamster wheel structure. That's a gravity ring.<br/><br/>Your character's clothing (generally thought of as crew jump-suits) has some metallic fibres spun into them, these are pulled down slightly by the magnetic floor plating and simulate a gravity for the character. This is so they're not freefalling through the ship or affected by the thrust of the ship in it's acceleration or decceleration.<br/><br/>If the concept of gravity is too much for someone though, these things are basically handwaves for there being gravity in a spaceship when there shouldn't be any. :)