there is a sliding thing...just pull out one steel cage below the sliding thing at first..thats mean u got 2 steel box on the surface of the water..just put one steel cage at the edge of the sliding thing..then u jump on the other edge..the thing will "jump" to the upper level ground.do it again for the other steel cage as well..there is one steel cage on the upper level ground rite?use it...put three of them at the place where u need to hold it..got three place on the upper ground where u need to stand and hold so the lock will open right??catch my point or not??then wa la!!!finish