Originally Posted by
deadstick35
Why the divide at 18 months? If there's an SIC on 12/3 and a PIC on 10/5, couldn't that mean 2 repo trips back to base just to swap? Now, do PICs and SICs usually stay together all 12?
Crew may or may not stay together the whole time.
Before Astro, a crew was together frequently simply because your days off paired up. Now the Astro system apparently keeps together more.