"and a directional ray gun thingy"
erps, don't wish for the impossible. All they need is one conventional attack helicopter armed with "antiradiation missiles". Probbaly have to tweak 'em for marine VHF use. Standard issue, they home in on a radio signal, typically a missile control radar station, and shut it down. A bit pricey, but you can write that off as a necessary "live fire training exercise".