It's done by the traditional way of bidding off of a bid packet or monthly schedules. You bid in preferential order and what your seniority holds you get awarded it. It includes everything from hard lines to composite/relief lines to reserve/airport standby lines. The hard lines include schedules that you would fly if awarded however if you don't like the flying but like the days off included in that line, you can trip trade multiple ways. Composite schedules which is a hybrid of a hard line and reserve is completely blank on the bid packet. Why? Scheduling builds you a schedule afterwards when all the trip trades are completed. Then reserve is, well, reserve.


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