Regimental sergeant-major (RSM) the most senior NCO in a battalion-sized army unit, including armoured, combat engineer, and signal regiments. Squadron warrant officer (SWO) the most senior NCO in a squadron-sized air force units and army signal units School chief warrant officers/chief petty officers (SCWO/SCPO) the most senior NCO in air force, navy and some army schools of battalion or squadron size. Base or wing chief warrant officer/chief petty officer the most senior NCO on a Canadian Forces base or wing establishment Fleet chief petty officer the most senior NCO in either Atlantic Fleet, Pacific Fleet, or Naval Reserve Ship's coxswain the most senior NCO on a Royal Canadian Navy ship (fulfilled by a chief petty officer 2nd class or petty officer 1st class for smaller vessels) Due to the unified nature of the Canadian Armed Forces, it is not unheard-of for air force CWOs or even navy CPO1s especially those of the so-called "purple trades", such as logistics or military police to find themselves filling the appointment of RSM in what are otherwise considered Canadian Army units (such as service battalions or communication regiments). Conversely, it is not impossible for an army CWO or navy CPO1 to be the squadron CWO of a Royal Canadian Air Force squadron. Senior appointments Senior appointments for chief warrant officers and chief petty officers 1st class entitle the incumbents to wear a modified rank badge or an addition to the rank badge. They are as follows: Formation chief warrant officer The coat of arms over the central insignia of the badge of the Canadian Armed Forces (crossed swords, an anchor and an eagle in flight). This appointment is given to CWO assigned to commanders at the base, brigade, wing, and division levels. Specific examples include base chief warrant officer, brigade sergeants-major, wing chief warrant officers, the division chief warrant officer (DCWO) of 1 Canadian Air Division and the division sergeant-major (Div SM) of 3rd Canadian Division (3 Cdn Div). A formation chief warrant officer would typically be seen with a colonel or brigadier-general, but may occasionally be seen with a lieutenant-colonel or major-general. Command chief warrant officer/chief petty officer (CCWO/CCPO) The coat of arms with a wreath of laurel wrapped around the base. This appointment is given to CWO/CPO1 assigned to commanders of commands including to the commander Canadian Special Operations Forces Command, commander Canadian Forces Intelligence Command and commander Canadian Joint Operations Command.