Wiktionary
petty officer first class
n. 1 (context Canada Navy English) A warrant officer in the Canadian Forces Maritime Command, ranking above petty officer second class and below chief petty officer second class. 2 (context US Navy English) A non-commissioned officer in the United States Navy and United States Coast Guard, ranking above petty officer second class and below chief petty officer.
Usage examples of "petty officer first class".
Harmon, social 477-98-9023, United States Navy petty officer first class.
Coxswain Petty Officer First Class Hudson regarded the lieutenant with hooded eyes, then bent forward to bring his internal systems on-line.