Force activities throughout Canada and worldwide. The RCAF's other Air Division, 2 Canadian Air Division, was established in June 2009, and consists of training establishments. There are 13 wings across Canada, 11 operational and 2 used for training. Wings represent the grouping of various squadrons, both operational and support, under a single tactical commander reporting to the operational commander. Ten wings also include a Canadian Forces base along with other operational and support units. The rank of general is held when an air officer is serving as chief of the Defence Staff. The commander of the Royal Canadian Air Force holds the rank of lieutenant-general. Divisions are commanded by major-generals. Brigadier-generals are typically second-in-command of a division. Wings are commanded by colonels. Squadrons are commanded by lieutenant-colonels. Majors are typically second-in-command of squadrons, or flight commanders. Captains, lieutenants and second lieutenants are the junior level leaders in RCAF squadrons and headquarters. Ranks Commander-in-Chief Officers Non-commissioned members On 1 April 2015, the rank structure and insignia changed. The rank of private was replaced with that of aviator, represented with a propeller for the rank insignia. The previously used term "leading aircraftman" was considered not to be gender neutral. The rank insignia were also changed: enlisted ranks were changed from gold to pearl-grey (silver) and officers rank braid was changed from gold to pearl-grey on black, similar to the pattern used before unification of Canada's armed forces in 1968. A revival of the former rank titles of the RCAF did not occur, however, as such an extensive change was considered "too complicated and confusing". Instead, the current rank titles were retained (with the exception of aviator). The Royal Flying Corps, considered to be a predecessor of the RCAF, used rank titles similar to the existing rank titles of the RCAF. Symbols Badge The badge of the Royal Canadian Air Force consists of: St. Edward's Crown An eagle superimposed on a circlet A compartment of maple leaves Motto: (Latin for 'Such is the pathway to the stars') Roundels Roundels used from 1920 until 1945 were usually the same as Royal Air Force roundels although not all variations were used and colours were matched to locally available paints. Stamps On 9 November 1984, Canada Post issued "Air Force" as part of the Canadian Forces series. The stamps were designed by Ralph Tibbles, based on an illustration by William Southern. The 32¢ stamps are perforated