B738 both minimums selectors required for dispatch?
In flight, I discovered I couldn't decrease the minimums on my selector with the "fast" mode of the selector; only the slow (single digit) increment was working.
We called engineers after landing, had a look in the MEL and were quite surprised to see that it simply says that 2 DH/Mins selectors are required for dispatch with no exceptions. Considering that the minimums can easily be copied from the other side with the Displays Control Panel switch, I don't see why one couldn't dispatch with just one DH/Mins selector, or even none if in VMC.
Does anybody know the reasoning behind this?