What is the meaning of the title "Dead Reckoning"?


From the Cambridge Dictionary about "Dead Reckoning":

a way of calculating the position of a ship or aircraft using only information about the direction and distance it has travelled from a known point.


What? The meaning had nothing to do with the plot. Why use the words in the title?

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Haven't seen it since it's release, but isn't everyone on the hunt for a set of keys to tap into a unique AI cybersecurity threat in the form of a prototype on a submarine that was torpedoed and sunk... somewhere? The subtitle seems to play into that to a certain extent, and as a bonus, it sounds fvckin' cool for a spy movie.

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Yes, that was the plot, but it had nothing to do with the word "Dead Reckoning".

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It’s most definitely a seamanship term, and the location of the sunken sub is being traced. It’s not used literally, but figuratively, because it’s a hip/cool spy title with potential for double entendre.

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