[John H K]

Might this cause tidal waves?

The energy of every nuke in the world combined is trivial compared to the energy of your average tsunami-causing earthquake or volcanic collapse.

So no, you can't cause a tsunami with nukes, unless you happened to be RIGHT NEXT to where it went off, and you have plenty of other problems to worry about then. You can't create a noticeable wave over hundreds of miles.

[Domestic Church]

Thanks for the *no tsunami worry* update. I'm all for nuking the smithereens out of these ships before they unleash their nasty loads.