I took out the American flag on my sub-strangely this was easy no S3D tricks-evidently the eqp file lists the flag node and you can comment it out. Appears there is a pirate flag to (also commented out)
HAR!. Below is a GATO eqp file-I didn't check the other subs.
Starting at the verry bottom of the eqp file. You don't want a flag just comment it like I did in [Equipment 19]
_____________________
Equipment 18]
NodeName=I07
LinkName=NSS_TBT_base_aft
StartDate=19410101
EndDate=19600631
;[Equipment 19]
;NodeName=I08
;LinkName=SubFlag_US
;StartDate=19410101
;EndDate=19600631
;[Equipment 19]
;NodeName=I08
;LinkName=SubFlag_Pirate
;StartDate=19410101
;EndDate=19600631
;************ The End ************