This is a list of Royal Navy ratings rank insignia. Insignia Royal Navy Royal Marines Trade (branch) badges Ratings in the Royal Navy include trade badges on the right sleeve to indicate a specific job. The information on the left arm is the individual's rate - e.g. a leading rate (commonly called a leading hand). One nickname is "Killick", for the Killick-anchor rate badge. Branch badges include stars and crowns above and below the branch logo, indicating an individual's qualification within their branch. One star indicates they have passed the required exam in order to be eligible to be selected for the Leading Rates course in their respective branch. Two stars indicates they have completed the Leading Rates course and are now eligible to study for the Petty Officers Qualifying Exam (PQE). A crown indicates they have passed the relevant PQE and are eligible to be Petty Officer. The insignia denotes trade and specialty. Branches and specialities Trades in the Royal Navy are listed below. Branch sub-specialities are denoted with an abbreviation on the branch badge. Ratings in the Marine Engineering and Medical branches may obtain "Dolphins" (qualify for the Royal Navy Submarine Service). Some personnel have an additional option to pass the All Arms Commando Course and serve attached to the Royal Marines. The branches were reviewed, revised and published in the Royal Navy's June 2013 BR3 (Book of Reference) edition (now the June 2015 edition). Engineering Logistics Medical Warfare Current (since 1975) 1951–1975 The Seaman and Naval Airman branches were: Leading rates qualified as instructors in the following branches: Radar plot Torpedo anti-Submarine, Gunnery Physical training Tactical communication Radio communication The instructor rate began to disappear in 1972, when fleet chief petty officers (warrant officers) were introduced. Other branches, including Naval Air Mechanics, were: Basic device: Junior or Basic Technical qualification Basic device with star above: Technical qualification for able rate Basic device with star above and star below: Technical qualification for leading rate* Basic device with crown above: Petty officer qualified for higher rate of pay Basic device with crown above: Chief petty officer qualified for lower rate of pay Basic device with crown above star below: Chief petty officer qualified for higher rate of pay .*not applicable to Coder, Supply and Secretariat, Artisan and Sick Birth Branches Before 1947, each branch developed its own device badges and the crowns and stars of one branch did not