The US Navy uses Teflon silver coated copper so it probably can’t be too bad. I’ve used it. It sounds good.
Right? Especially with all the Krell and B&W Nautilus speakers they have running around those aircraft carriers and F-15s.
Come on! :) Suitability for the Navy doesn't make them necessarily suitable for audio. But I have to admit, those cables are pretty sexy when you can find them on e-bay.