Men of Honor (2000)
Crew or equipment visible
Errors in geography
All the ranks of Chief are classified as "petty officers" along with the lower grades simply called "third class petty officer" (E-4), "second class petty officer" (E-5) and "first class petty officer" (E-6), then "Chief" (E-7), "Super Chief (E-8), and "Master Chief" (E-9). In addition, a one step reduction in rank would make him a "Super Chief." The latter two ranks did not come into existence until 1958, so Sunday could not have been a "Master Chief" in 1956.
The senior Master Chief at a command is the Command Master Chief, on a submarine he is called "Chief of the Boat." The rank requires special training.