Off R oth ch ild is land in Antarctica, you can see a roughly 6 x 8 pattern of holes off the sea floor. Best estimate I come up with is a spacing of every seven miles is a half miles wide hole. First off, that isn't a natural thing for grid spacing like that. Secondly, if you had submarines for below sea floor tunnels to various places so you wouldn't be seen or detected, that would probably fit the bill. Hit global mapping satellite images and see for yourself, I haven't seen where anyone else has noticed or posted it so far.