Originally, the airlock was placed at Operations to allow divers and Big Daddies to access the seafloor. However, as garbage disposal services were expensive in Rapture, dumping broken electronics on the seafloor was seen as a cheap alternative. As a result, the seafloor became littered with all kinds of broken machinery. After Reed Wahl locked Minerva's Den down, no maintenance was done to the exterior of the buildings, adding pieces of broken tunnels and bathysphere guidance brackets to the graveyard. File:Spoilers.png