>> "I am also assuming once the cable are laid, it doesn't make much of a difference whether the surface is Artic or Pacific? I am assuming the sea floor is rou

>> "I am also assuming once the cable are laid, it doesn't make much of a difference whether the surface is Artic or Pacific? I am assuming the sea floor is roughly all the same." The ocean is incredibly difficult to explore under the best circumstances. We barely know what's down there in places with lots of traffic and a need for regular, slow, imprecise mapping. More than nothing is known about the floor there, but it's likely less precise and more out of date than places that were easier to reach. The Arctic Ocean wasn't even discovered--in the Age of Exploration sense, not in the "nobody knew about it" sense--until the 1800s. Exploration didn't properly begin until the 1950s. https://www.britannica.com/place/Arctic-Ocean/Topography-of-the-ocean-floor https://www.britannica.com/place/Arctic-Ocean/Topography-of-...