[GOPJ]

They then had a problem in that they didn’t have anything that could produce enough power to “energize the field coils” (or something like that) of the generators. The USN arranged for a nuke submarine to pull up to the dock and essentially “jump-start” the island. I remember the photo in the newspaper; the cable looked to be about the size of your leg.

Great news! Thanks for sharing. How far underwater would a sub have to be to avoid being hit by an EMP? (For land - an EMP 125 miles above Nebraska would knock out chips to 99% of US... some parts of Florida might be OK...

[DuncanWaring]

Since they’re basically big steel cans, and designed to ride-out a nuclear first-strike, I’m pretty sure even a surfaced sub would be immune to an EMP.