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On Fri, 03 Jan 2020 15:54:05 -0500, wrote:

On Fri, 3 Jan 2020 11:05:50 -0800 (PST), Tim
wrote:

- show quoted text -
I saw that the Navy is going back to teaching celestial navigation to
their crews so somebody must think it is important. I suppose someone
pointed out the GPS satellites might only last a couple days in a real
war.
.........
I’d heard Morse code is coming back too. Even for military pilots. I’d think it’s a good deal

I bet "flashing light" could still be handy in this age of stealth
ships. You light yourself up as soon as you key a mike.
I bet they also have a laser high speed link they can establish
between ships. There is no hardware reason not to. Sampling the stable
element signal from the fire control system along with a feedback
loop, would allow you to keep the laser on target in the roughest
seas.

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It's entirely possible but probably secret if it exists. I'd use an
infrared laser that would be invisible to the human eye.