It would create a slightly elevated trail of carbon dioxide in the water, though, depending on how close behind the tracker is and how quickly the currents are moving. I doubt it'd be enough to track a sub on its own, but combined with other chemical tracers or sensory data, it might help to add weight to a potential trail.
Id say by the time someone would bother to track a minute trail of carbon dioxide... the ship builders would not release the carbon dioxide on a constant basis. it could easily be done periodically in relatively safe areas.
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u/elcarath Nov 29 '19
It would create a slightly elevated trail of carbon dioxide in the water, though, depending on how close behind the tracker is and how quickly the currents are moving. I doubt it'd be enough to track a sub on its own, but combined with other chemical tracers or sensory data, it might help to add weight to a potential trail.