This storied sub sank six Japanese ships during four tours of the Pacific in World War II. The vessel has been painstakingly restored to its 1945 condition by admirers, who also run a smart, war-themed gift shop on the dock alongside it. (Note that an interior visit is not recommended for the claustrophobic or the infirm.) Thanks to their efforts, she’s still seaworthy, although sadly, the last time she was taken out into the ocean was for the filming of the abysmal 1996 Kelsey Grammer film, “Down Periscope.” How glory fades . . . .