Wing Trenton 8 Wing Air Reserve Flight 9 Wing Gander 9 Wing Air Reserve Flight Air Reserve Flight Detachment Torbay 12 Wing Shearwater 12 Wing Air Reserve Flight 14 Wing Greenwood 14 Wing Air Reserve Flight 91 Construction Engineering Flight 143 Construction Engineering Flight 144 Construction Engineering Flight 16 Wing Borden 16 Wing Air Reserve Flight 17 Wing Winnipeg 402 Squadron 17 Wing Air Reserve Flight 19 Wing Comox 19 Wing Air Reserve Flight 91 Construction Engineering Flight 22 Wing North Bay 22 Wing Air Reserve Flight Health Services Reserve The Health Services Reserve, with approximately 1,700 members, is organized into two functional groups: Primary Reserve units known as field ambulances, and the 1 Canadian Field Hospital Detachment Ottawa. Core tasks assigned to the field ambulances include force-generating trained personnel to support, augment and sustain Canadian Forces Health Services Group's domestic and expeditionary commitments, to provide health services support to their affiliated Canadian brigade groups and to conduct community outreach activities. The members of the 1 Canadian Field Hospital Detachment Ottawa include specialist clinicians and provide depth and breadth to the Health Services Group on international operations and in military clinics within Canada. Training and employment The level of activity associated with being a reservist varies from formation to formation. There are three classes of service available to Reservists: Class A The most common form of employment for reservists; members are employed on a part-time basis within their unit. This form of employment is entirely voluntary, provides no job security and fewer benefits (e.g., medical and dental) than the other classes of service. The Class A contract covers training or employment up to days. Class A reservists are generally limited to a certain number of paid days per year. Most units provide employment for training in the form of one evening per week or two full days a month during the training year (September – April). Units also normally provide one additional evening a week for administration purposes. Reservists are obliged to accumulate a minimum of 14 full days of service per year and may not exceed of unauthorized absence during which no fewer than 3 duty periods were conducted by the reservist's unit. Those failing to adhere to these requirements can be deemed to be Non-Effective Strength and can be subject to administrative action. Class B This class of service is for Reservists employed full-time in a non-operational capacity.