• BradleyUffner@lemmy.world
      link
      fedilink
      English
      arrow-up
      5
      ·
      edit-2
      5 hours ago

      Ok, so tell me how you are going to get a location fix underwater, in the dark, with no landmarks to orient yourself, in constantly shifting currents?

      Even the Navy’s most advanced nuclear submarines have to surface to get their location. This thing was a carbon fiber tube with an Xbox controller and an idiot designer.

      • Geodad@lemmy.world
        link
        fedilink
        English
        arrow-up
        2
        arrow-down
        2
        ·
        5 hours ago

        You use your starting point as a baseline and keep track of the movement of the craft.

        • bthest@lemmy.world
          link
          fedilink
          English
          arrow-up
          4
          ·
          edit-2
          3 hours ago

          Dead reckoning which is usually hit or miss on the surface but better than nothing. Probably worse under the water. It’s why all these subs that dive to Titanic have to drop down until they hit the floor and then swim around until they find a landmark that points to the ship. They only have a rough idea of where they are when they get to the bottom.

        • BeardedBlaze@lemmy.world
          link
          fedilink
          English
          arrow-up
          6
          ·
          4 hours ago

          Just because you set the sub to a set knot speed, doesn’t mean it’ll actually cover that distance in that time. There are ton of currents going in all different directions.