Naval scenes in Boston harbor

We took a leisurely Friday morning sail in Boston harbor (by leisurely I mean there was little wind) and saw a lot of naval activity. First a battleship came into the harbor and was followed by a fireboat making a welcoming display of water shooting in the air. Then as this battleship arrived a naval vessel left dry dock. We think this latter ship was a fueling ship. Two examples of the ever changing scenery in harbor. BTW - when these naval vessels are around you make certain that you stay your distance. They have intimidating fast boats traveling in convoy with them and they are not messing around.