Pittsburgh Police hats with checkered bands, which are dark navy blue and gold in color, popularly known as the "Sillitoe Tartan" and named after its originator, Percy J. Sillitoe, Chief Constable of Glasgow, Scotland, in the 1930s. While the checkered band is a common police symbol in the United Kingdom, Australia and some European countries, the Chicago Police Department, Cook County Sheriff's Police, the Allegheny County Sheriff's Office, and the Pittsburgh Bureau of Police are the only police forces in the United States that have adopted it as part of their uniforms. As recently as July 1930, police were required to wear
Police vehicles in the United Kingdom systems. Although both observers are often police officers, the pilot does not engage in any police activities and is usually not a police officer. Police forces whose area includes significant waterways often include marine support units. Not only do these units police the waterways, but they also maintain a capability for waterborne rescue, usually in cooperation with HM Coastguard. Battenburg markings Jam sandwich (Phased out of London Metropolitan Police Service in 2012) Police vehicles in the United Kingdom The 52 police forces in the UK use a wide range of operational vehicles including compact cars, powerful estates and armored police