Radioactive

I'm listening to the 1985 tune Radioactive on YouTube and this map shows up in the video stream. Wait a minute, that looks like the area where the USS Pueblo was intercepted by the North Koreans back in 1968.
    The video is basically a slide show of all the wonderful things the atomic age brought us, like A-bombs, hazmat suits, geiger counters, etc. So how does this map fit in? There is a red and yellow radiation warning symbol in the lower left quadrant, and several skull & cross bone icons. I don't recognize the one with the vertical red bar on the black background. So maybe the North Koreans were playing with atomic energy, which would explain why the Pueblo was snooping around there in the first place, and why the Norkies were so persnickety about it.

Update from Jack: The Pueblo is the second oldest commissioned ship in the US Navy. The oldest is the USS Constitution (the square rigged sailing ship from the Revolutionary War era). The Pueblo is still commissioned since we haven't been able to get our hands on it to decommission it.