Wouldn't that thermal signature pretty much negate the Stealth aspects if the Zumwalts are fully engaged in battle or battle ready status. Hella thermal bloom... no?
Yeah...I admit to thinking rather one-dimensionally about it, since it is possible there are systems that have multiple terminal guidance modes, optical, infrared, emissions, radar, maybe combinations of all and more. I haven’t followed it that closely, so missiles of today probably have all those things.
I would expect the designers would work to minimize the thermal emissions as well, but I suppose there is only so far one can go.