Istanbul airport crew transport at 03:00, how does it actually work

For new joiners: the crew transport picks you up from designated points around the city on a schedule tied to your report time, including the 03:00 ones. Know your nearest pickup point before you sign a lease. Some neighbourhoods have a door pickup, some need a taxi to the point. It is free and reliable, but the airport is far, so the pickup is often two hours before report.