^ That's right, a very important person, so what's an enemy Romulan going to do if he sees the Captain's yacht separate out from the Enterprise when they are in battle?
Well, I was thinking it would be a craft that wouldn't be used any potentially dangerous situation, much less a battle. I don't think it would even be armed.
I think the captain's yacht aboard the Enterprise
-E, was built with some tactical sensibilities in mind, though. Picard used it to go after Data's scout craft and it could fire at least tachyon bursts. They're not as destructive as phasers and can be used for many different purposes, but they can disrupt various systems aboard other vessels too.