CX Captains operating as Relief Commander.
(Quoted from a recent discussion on the upper floors).
Since the beginning of the 2008 CC has rostered over 160 ULH sectors utilizing a second Captain for relief duties.
After the roster is printed the actual number of sectors this has occurred on is much higher due to disruptions taking place.
With most crew choosing not to work on G days CC have no option but to use whatever means possible to crew flights at the moment.
Many of these Captains are into overtime also.