In Boneyard and on the ship, there is a staircase with two flights that leads from the ground to the ship. This staircase is to your right when you are looking at the Elite spawn on Invasion. Walk onto the upper flight of stairs and look at the fence keeping you from falling off the ship. Jump to the lower part of the fence and turn to the open area, then jump onto the part of the ship that hangs over the edge. You are now out of the level boundary. If there is only one person on the console, look at the indicator of where you are (bulkheads, under the ship, bridge, etc.) to see that it reads 'out of bounds'. This is a great location to pick off the Elites in Invasion with a DMR. Note: You can only walk so far over before you fall off the ship and die.