As everyone knows ships have experience levels.



The chart for level impacts on the wiki is: http://endlessspace.wikia.com/wiki/Ships



However, it's not clear to me if that is multiplicative, a baseline bonus or additive.



For instance, the + defense/damage is listed at +20% for level 4.



At level four do you have +20% (Baseline) +38.6% (multiplicative) or +35% (additive).



I have noticed that at level 10 my ships never take damage vs. the AI and it's not uncommon to see my level 10 cruisers destroy AI dreadnaughts with their opening Salvo (but that could just be lucky crits).



Does anyone know how this works?