Ok
i also run most of the mods you have above and thought early in my carrer where are the cargo decks because I saw none.
But further into my carrer (late 1941 after America joins war) they started to show up in the convoys. (planes. trucks, tanks)
So don't fret they are there.
__________________
Sir! What was that noise?
Ironically the Shorts Sunderland is code letter U of No. 461 Squadron,
and the submarine is U-461.