to summon a air support all the contacts need to be visible either on ya map or my sight......which is hard to acheive without all hell breaking loose, also you need to remember what the axis air range is i.e no good trying this in the middle of the atlantic etc. if you do try this the best you will get is a couple of u-boats coming to back you up......but that can take days. i tried it once on a convoy, i ran out of torps and as i was heading away about 1 hour after the dds left me alone i bumbed into 2 VIIC subs trying to back me up!!!!! awesome, but i didnt stay around
