One thing I hear on my TeeVee from the punditry class of aviation experts regarding this mishap is that the military and civilians aren't on the same freq (UHF/VHF). They speak as though mil helos can't monitor/talk on VHF. Is this an anachronism (mil only talks on Uniform)? Are there any mil helos that can't dial up a VHF freq? Whether or not they choose to, or are required, is another story.