Last night I was on watch from 2100 to 2400 hrs. It was quiet and we were moving along at over 9 knots. At about 2330, after checking the horizon and the radar for any traffic, I went below to check Emails and request an updated GRIP file. I could not have been down there for more than 10 minutes. On my way up I stopped and grabbed a chocolate pudding. When I got back into the cockpit and looked around, I yelled "Holy Shit". It looked like a parking lot. Red and white light all over the place. A quick look at the radar looked like I was in a marina. The closest boat was about 1 mile off my Stb bow. I quickly altered course to Stb and turned on our mast light to illuminate our sails. I then quickly got Walt of bed for an extra set of eyes. It took us a while to figure out what was going on. I radioed out on 16 to "any boat in the area of 30n x 79w please respond on chan 16. I tried 3 times without an answer. I finally called and said " with all the boats out here someone should answer." Finally someone spoke up. It was a British voice and he told me they were UK war ships conducting maneuvers and he had us on his radar. They all altered course for us. We were sailing after all. They came out of nowhere and left as quickly. About 40 minutes later another ship passes with in a mile of us. We called and they quickly answered as US WAR SHIP 49. They had us on radar and where going to alter course to go behind us. We wanted to ask em they knew the Limeys were playing in their sandbox... but thought better of it. Just a little excitement....