I havent seen this question asked(as far as i know) and would like clarification on it please, so here goes. On the Econonics panel you can invest in Rail & River transports to (A)move your units efficently & (B) to use the excess units to move your supplies to frontline depots. Now on the main in game screen on the top panel for this area, where it tells you your current levels, there is a 3rd option called Naval supply (i think its called). I have never got this above 0 , and was wondering what i need to do there, if anything ?
Thanks
