I'm also astonished by the up and down calesthenics of the periscope. I wonder today if they even use them with actual human-eye-optics.
I could see a periscope with a "head" made up of dozens of cameras that aim in a complete 360 degree circle, probably smaller in profile than an optical scope.
You pop this thing up above the water for 2 seconds, let it record hi-res images/movies, then pull it down and analyze it on a computer screen. Probably have a computer do relative motion analysis and tracking all by itself.
Steve
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