I am a majestic vessel, a symbol of naval power and global reach. My class revolutionized naval warfare, but I'm also known for a major mishap early in my career. I'm often mistaken for another class of ship but boast a unique configuration. What am I?

1. My class was the first to utilize nuclear power for propulsion.
2. My sister ship experienced a reactor accident that had wide-reaching consequences.
3. I have a distinctive 'island' structure on my flight deck that sets me apart.
4. I'm a type of aircraft carrier but not a supercarrier, although I predate them.