[Loyolas Mattman]

Large magnets? Are we at war with Al Qaeda or Wile E. Coyote, supa genius, armed with the complete line of Acme Products?

Beep Beep!!!

[verity]

What about dangling pigs over-the-side?

[justlurking]

Magnets are used in limpet mines:

http://www.masnz.co.nz/brochures/limpet.pdf

No, that's not a real one: it's an "exercise" mine.

[Central_Floridian]

I think they would want magnets to attatch explosives to the hull of a ship.