UDT old school SEAL training.
Frogmen.
God Speed.
Gonna have to think harder on that.
How much energy would be required to spread 30, 120, 300 and especially 2500 miles?
They taught you this shit in highschool.
https://pressbooks-dev.oer.hawaii.edu/collegephysics/chapter/16-11-energy-in-waves-intensity/
College book but its more detailed as well.
Energy v Intensity over an Area.
Always thought it was weird Neil Armstrong took back seat when he was the first.