CHQ pilots can fly the 135/140.145 interchangeably. The 170's and 175's at Republic will also be flown interchangeably. IF Shuttle gets 175's, then those pilots will also be able to fly the two aircraft interchangably. And since the 190 is the same type rating as the 170/175, a pilot will be able to fly the 190 as well if ever that comes to be. As a pilot on the master seniority list, your ability to change aircraft and certificates is based solely on pay increase. You can bid for any increase in pay. Since all FO's are paid the same, you are essentially equipment locked as an FO, and company locked (if at Republic as an FO, you cannot bid over to Shuttle FO. Even though it is the same equipement, there are procedural differences that require retraining). The pay hierarchy, from bottom to top, is as follows: 1) all FO 2) 135/140 Capt 3) 145/CRJ Capt 4) 170 Capt (up to 78 seats, this may include delta 175's) 5) 175/190 Capt. (Airways 175s will be 86 seats and therfore top pay)

If you are at CHQ, and are a 135/140 captain, you get paid the 145 rate for all the time you fly a 145 that month. Same goes for 170 Captains who fly 175's or 190's for part of the month. Again, you can only bid to an increase in pay. A 135 captain could bid CHQ CRJ, Shuttle 170, or Republic 170. A 145 Captain could bid Shuttle 170 or Republic 170, or bid to a 135 base (same type rating, so it is allowed even though it is pay decrease- company doesn't have to pay for any additional training) and then bid the CRJ. Shuttle 170 captains and Republic 170 captains are currently stuck, as no Republic 175 CA bids have been added yet. But once a 175 bid is announced somewhere (and it is configured for more than 78 seats), then Shuttle pilots can bid over to Republic.

All in all it is highly convoluted. Just keep in mind that the pay rules and bidding rules in place now were written when there was only one certificate, and there were only 135/140 captains, and 145 captains. It was simple then. Contract negotiations begin next year, and it is likely that this process will be simplified at that time. For now we are stuck with what we have. But yes, it is a master list and pilots can bid between aircraft and certificates.