The nuke version of the ASROC utilizes a W44 warhead, which is actually pretty small. The system was developed to counter early Soviet SSBN's who
were loitering off the coast of the US. If war broke out, a destroyer or frigate could get a few nuke ASROCs off at the Russian boomer they were
trailing, in hopes of sinking or at least crippling it B4 it got its SLBMs out of the tubes.
This site has some awesome pix of the USS Agerholm live testing a nuke ASROC. BTW, there is no minimum range for a nuke ASROC. If you shoot it
anything less than max range.....you are toast.
Nuke ASROC
Ahhh! The old days, when nukes were a good thing....