To clarify my earlier posts. The refueller does NOT start fuelling until given a pre-fuel/provisional fuel load, and does NOT disconnect until we give him/her the OK to do so. Yes, the refueller is only allowed to refuel in AUTO mode. No individual tank can be selected for refuelling purposes.
To use the definition of "supervise" would be to stand with the refueller the whole time during fuelling operations. In a normal transit, this would be next to impossible.
For example, a 1 1/2 hour turnaround on a 747 with two engineers doing the transit couldn't be done, particularly on LAX or JNB sectors. What with arriving the aircraft, connecting ground power and external air as required, doing walkaround inspections, engine oils, going upstairs checking cabin and flight logs and doing a cabin check. Should there be a wheel change, how many people are you going to get so you can supervise the refuelling which can take up to an hour if there's only one truck to refuel?
There is a difference between checking the fuel panel at the end of refuelling to ensure the switches are off, fuelling connector covers refitted and fuel panel cover closed, and to supervise the refuelling operation in its entirety. A bit like AME supervision if carried out as it is intended. 1 LAME to 1 AME.