[8] [9] Famous examples of this are: - Lieutenant Commander Lionel Crabb Royal Navy who in conversation, biopics, Admiralty correspondence and even statements in Parliament by the Prime Minister is almost invariably referred to as “Commander Crabb”.
[10] - Acting Temporary Lieutenant Commander Ewen Montagu RNVR, who is routinely referred to as "Commander Montagu" in historical and contemporary records, and in interviews by his colleagues on Operation Mincemeat.
The USN settled on "lieutenant commander" in 1862 and made it a distinct rank.
This distinction was ostensibly abolished when the rank of lieutenant commander was introduced, although promotion to the latter rank for officers on a full career commission (FCC) was automatic following accumulation of eight years' seniority as a lieutenant.
The ROC wore a Royal Air Force uniform and their rank insignia appeared similar to that of an RAF squadron leader except that the stripes were shown entirely in black.
On service khakis and all working uniforms, lieutenant commanders wear a gold oak leaf collar device, similar to the ones worn by majors in the United States Air Force and United States Army, and identical to that worn by majors in the United States Marine Corps.
Above or inboard of the stripes, they wear their speciality insignia (i.e., a star for officers of the line, single oak leaf for medical with silver acorn for Medical Corps, crossed oak leaves for Civil Engineer Corps, United States shield for the Coast Guard, etc.)