too much armed merchants - where to change ?

[Kpt. Fasser]

Hi,

i am playing the second campaign at the moment (03/1940). i want to change the armament of the merchants, because approx. 80% of the bigger merchants (regardless of convoi or single ship) are armed with a deck gun (bow & rear), which is afaik not historically correct.

can this be changed to a more realistic percentage ? where ?

thx