They have free audio self guided tour which is more to my style. They also have "Yellow Hats" who are ex military and give talks about how things work on ship and how they were during the wars. Very cool stuff.
For the island which is the con tower it is every 20 minuites
The ones I saw ran every 30 minutes
Not sure...been once and just toured ourselves...been twice for overnight trip which had guided tour, after hours and into nonpublic locations of the ship.
Thanks! Your answer is awaiting moderation.