level; the buoyancy and natural flow  of the ice pack makes this highly unlikely and is not something that  could be accurately described as an island in the first place. The  top of the tunnel is at the whaling station and descends at a  "perfect 30 degree angle" to the pyramid (thus placing it over half  a mile away horizontally, youd travel 3464 feet horizontally), yet  we are told satellite imagery shows that it is directly beneath the  whaling station. Further confusion is caused by the scene at the end  of the film in which a large tank falls into the water and plunges  hundreds of feet towards an unseen ocean floor, supposedly directly  offshore.