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Comment on Tragic Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

BradleyUffner@lemmy.world ⁨3⁩ ⁨weeks⁩ 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?

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Hadriscus@jlai.lu ⁨3⁩ ⁨weeks⁩ ago
Like on every ship ! by looking at the stars

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- elevenbones@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago
  U mean starfish?
  
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Geodad@lemmy.world ⁨3⁩ ⁨weeks⁩ ago
You use your starting point as a baseline and keep track of the movement of the craft.

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- BeardedBlaze@lemmy.world ⁨3⁩ ⁨weeks⁩ 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.
  
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- bold_atlas@lemmy.world ⁨3⁩ ⁨weeks⁩ ago
  Dead reckoning. Usually hit or miss on the surface. Probably worse under the water.
  
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Crashumbc@lemmy.world ⁨3⁩ ⁨weeks⁩ ago
Yes and they use SINS, now this probably didn’t have an expensive SINS setup but they did have communication with the surface that was tracking them on sonar. They did have location data.

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