As you know, I'm working on a roleplay setting in which the local variety of Latin is preferred to English. Thus, all military ranks are to be written, and abbreviated in, Latin. However, Nauarkus (Captain) is the only naval rank for which I've been able to get a decent translation. The ranks that remain in question from lowest to highest are Ensign, Corporal, Petty Officer, Chief Petty Officer, Command Chief Petty Officer, Cadet, Lieutenant, Commander, Commodore, and Admiral. How would one translate those ranks? If no adequate Latin translation exists, would the modern Italian translation suffice?