no but the military is never told everything, and I did some checking these techs where classified by Archer as Stealth not a cloak, and the way it works is vasty inferior to a real cloak anyway. It uses a particle field to mask it from sensors, it does not bend light around it, so calling it a cloak is wrong in the first place. So stiles and spock having no clue about cloaking devices would make sense, because what we saw in ENT used a particle field to blind sensors simliar to how our stealth works today, it did not bend the light around. So I belive these primitive defensive systems fit fine, and are a precusor to the cloaking device.