Get on top of map on "Covenant"
When you get to select which checkpoint you want to go to, choos Bravo. Work your way with a Mongoose to the part where you first see a Shade and Ghosts come out. Board a Ghost and go up a small opening next to some rocks, next to the main road, and boost your Ghost up this "path". Go the top of the hill. When you reach the top, there will be one or two soldiers that will compliment your Ghost, you, or ask questions. Keep going straight. Your screen will start to glitch and it will seem as if the game has frozen. A few moments later, you should be either on land or above the ocean.