The base if fairly mixed. The top portion is, however, the last 8 spots (I believe) on the roster are new hires - some of whom are still finishing training. With that being said; no, I don't believe a new hire based elsewhere would be able to bid BOS. There is a current FO vancacy open and there are no BOS positions. Obviously one could open if someone decided to transfer, but now the company does not even guarantee filling of secondary vacancies.