Another point the section also states  Personnel E to E have no rating and are thus called nonrated men or nonrates however they are broadly classed into one of five groups of junior rates Seaman SN Fireman FN Airman AN Hospitalman HN and Constructionman CN  First it almost looks like there is some slight mixing of terms rate and rating here  Second for personnel who are E to E in reference to the nonrated and nonrates terms quoted in the text you might want to add that what is frequently used for those who actually do not have a rating usually because they failed out of their school is the term undesignated which is used for example as undesignated seaman or undesignated fireman apprentice etc