Am I right in thinking that a single 2 pilot crew would be in charge of the plane from 5am till around 10:30pm?
There are operators who are of the belief that you can be in charge of a aircraft over 4 sectors from 0500 till 1900. The rationale being that because you have been allocated a legal duty under the exemption, you (a) cannot be fatigued and (b) are therefore both physically and mentally fit to extend.