This basically means that you inform the cabin crew that you are taking controlled rest, you then take turns to have a rest for a maximum of 30 minutes each.
I recon they should have to inform pax as well as crew, I'm sure that would go down well in cattle class.
Or even better when buying tickets, it should be stipulated on the back of tickets something like "One of the two pilots might be asleep during the flight, it's OK though because the other pilot will wake them up before he/she goes to sleep".
