While it looks like a missle launch to me, and there are weapons ranges over that way, my say is that curiosoty killed the cat. So what if the goverment launched a new secret weapon for a test. You all should just take it for what its worth and drop the whole damn thing. I am a firm believer in that the public doesn't need to know everything. Military secrets are just that, secrets, they are that way for a reason. Being a Submariner, I understand this more than others. Loose lips sinks and has sunk ships, during WWII our subs would dive under the Japanese depth charges because they were setting them too shallow, then a damn politician blurted this out to a reporter and it was published. We started to lose submarines at a increased rate because of that.
When surfaced, the bridge access hatch can be optionally open or shut, however, when submerged it is required to be shut. (Really a no s***t precaution from a procedure in use in the sub fleet today.)