Is USS Salem the only autoloading heavy-gun system that visitors can inspect?
Short answerThe live answer is yes from memory, with the claim left explicitly unverified.
NotesA viewer identifies USS Salem as a surviving autoloading system open to the public. The response agrees from memory. Salem is a preserved Des Moines-class cruiser where visitors can encounter the Mark 16 machinery. Its status as the only accessible example remains unverified.