Effects of Fatigue on Artillery

[BigDuke66]

Hi
Well the manual isn't clear here on page 36 it says
"Artillery Rule
The Fatigue affects described above are doubled for Artillery Units. See the section on Design Notes for an explanation of this rule. "

but the design notes on page 55 say:
"Why the double Fatigue firing effects on Artillery? Based on experience,
players found that it was just too unrealistic for Artillery to remain under enemy
fire turn after turn accumulating Fatigue and perhaps the occasional loss, but
not really suffering enough to motivate the player to withdraw the battery.
Surely as a result of this fire, the battery, while perhaps not losing cannons, is
suffering damage to its crew and equipment that has a detrimental effect on its
ability to fire. This attrition to the ability of the battery to fire is the basis for the
increased Fatigue firing effects. "

It sounds like the notes just mean only fire effects but the rule seems to mean all fatigue effects describe.
What is it now exactly that is doubled?
Fire Vaule
Melee Strength
Moral