Right up there with trip trading and min reserve levels/staffing for must fixes on the next contract. I'm all for giving seniority its due, but giving the senior pilots two cracks at vacation on the first round of bidding takes the most desirable slots off the table for most of the pilots. What's wrong with bidding for one block at a time on each round, even allowing two weeks to be bid together? Senior pilots will still get the slots they want the most, just not both of the slots they want the most.