Ok this is from a friend of mine who served aboard on of the US's Nimitz Class carriers.
"There are anywhere from 14-18 Ships in a CVBG(Carrier Battle Group) at any given time. the ships break down as such, Carrier (at the center of the
group), 3 Frigates (on patrol around the carrier about 10-12 miles from carrier), 4 Supply ships, 3 Destroyers (also on patrol 8-10 miles form the
carrier), 2 SSN's (on patrol about 12 miles from carrier), then you also have at least 2 Anti sub planes on patrol at all times and a Flight of
Fighter planes on patrol at all times. An AWACS at 35000-45000Ft at all times. Not to mention the carrier has at least
2-3 Flight groups On call if they need to be scrambled at any given time. the Carrier along with the frigates, destroyers and subs and aircraft CIC
and CIWS (Combat Information Center and Combat Information Warfare System) give a combined coverage area 50- 60 miles from the center of the Battle
Group in the air and 20-35 miles at sea level. The carrier, Frigates and Destroyers also carry and utilize the Phalanx Missile interceptor system.
this system is utilized to knock down incoming missile and aircraft threats.
Insofar as a missile with an emp warhead goes. If it was not knocked down by the Phalanx and it detonated all electronics aboard our modern Naval
ships are hardened against all such types of attacks.
edit on 12-7-2011 by SetsunaFSeyei because: Incorrect Information