We simply said that the science backs up the fact that they are safe after you said this....
I think the concept of a CDO in itself is not unsafe.
I mean, just think of how we could be calling an ordinary daytrip that reports at 09:00 and finishes at 21:00 after a couple hours sit in the middle a "continuous duty day."
But as we know, it's the mixing around, the flip-flopping of circadian rhythms from AM to PM that cause the fatigue.
Like a crew who flies early morning stuff on day 1, 2, and 3 and then has to report at 23:00 base time on the west coast to somehow fly to the east coast right through every single hour they would have been sleeping.
As an outsider looking in, I really hope DL pilots do not allow CDOs.
Reason being, it's like the phrase letting the camel's nose under the tent.
Even if they are introduced with a decent arrangement of rules and restrictions, they are there. And if something eventually happened where those rules were brought up and some wanted to change them, it's that much easier because it's amending something rather an introducing it from scratch. I'm just thinking of all the things lost post 9/11 when push came to shove and concessions were inevitable and pilot groups had to choose what was most important to keep and what could go if it absolutely had to.
Rather than introduce CDOs, something that has riddled the vendor section of this industry with hundreds if not thousands of fatigue calls over the years, and which if not done correctly, have an extremely small percentage of pilots who actually want to see them on their schedule, I think the focus should be on something else.
Whatever it is that makes some want to allow CDOs is, in my mind, the thing to try fixing first. Perhaps it is the 30 hour layover which apparently credits nothing? Is that right?
An arbitrator just ruled on one of the items that a DL connection airline had going into forced arbitration and the ruling favored the pilot group and layovers that span an entire calendar day went from crediting zero to credit the min day credit of 4 hours. Suddenly an 18hr 4-day is a 22hr trip etc.
Surely the mainline company, which is making money hand over fist by airline standards, could possibly discuss with the union an option to do this without major concessions in other areas.