Rear Admiral—two silver stars with a silver foul anchor in rear of them.

Commodore—one silver star with a silver foul anchor in rear of it.

Captain—a silver spread eagle with a silver foul anchor in rear of it.

Commander—a silver oak leaf with a silver foul anchor in rear of it.

U. S. Navy. Officers’ insignia of rank and Corps on collar
of blue service coat, showing right side of collar

1. Admiral of the Navy  2. Admiral
3. Vice Admiral4. Rear Admiral
5. Commodore6. Captain

U. S. Navy. Officers’ insignia of rank and Corps on collar
of blue service coat, showing right side of collar

1. Commander (Silver leaf)  2.Lieutenant Commander (Gold leaf)
3. Lieutenant4. Lieutenant, Junior Grade
5. Ensign6. Medical Officer with the rank of Captain