Petty officer
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A petty officer is a non-commissioned officer in many navies. They are superior to a seaman, and subordinate to more senior non-commissioned officers, such as chief petty officers.
A Royal Navy boatswain's mate in 1820
A petty officer of the Royal Navy on parade in London in 2015. Gold chevrons on the left arm represent good conduct, each one representing 4 years of service. After 15 years of service, with no breaks in good conduct, the individual is presented with their Long Service & Good Conduct Medal (nicknamed in the RN as Long Service & Undetected Crime Medal) it is the medal on the far right of this Petty Officer's row of medals.
Five United States Navy Reserve petty officers in Service Dress Uniform. From left to right: HM1, AT1, HM1, HM1, AT1.
Sergeant
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Sergeant is a rank in use by the armed forces of many countries. It is also a police rank in some police services. The alternative spelling, serjeant, is used in The Rifles and in other units that dra
A U.S. Army sergeant from the 29th Infantry Division in 2011.
UK Police Patrol Sergeant epaulette
Los Angeles Police Department