Play by Post (How to) Zones and how to move.
You will noticed that each ship area is a zone.., some areas are listed to have more then 1 sometimes.
Zones in the forward end of the ship are all connected by the forward passage ways, while all zone aft, are connected by the aft passage ways.
If you wanted to wanted to walk from a FWD section of the ship to an AFT section of the rig.
a person needs to walk through the connected walkway.
For example, if a person wanted to walk from the bridge to the engine room, the route would be from the bridge, aft walkway, engine room. If walking back to the bridge, he would leave the engine room, fwd walkway, then the bridge.
The machinery spaces connect every zone to another zone. IE, air ducts, crawl spaces, air shafts, etc. But before you get any crazy ideas, these areas are cramped, dark.. and full of terrors.. oh wait.. wrong genre! We all saw the first two alien movies.. not a good place to be. :D