In WW2 1942 6 Player FFA #217478767 the naval blockade feature does not appear to be working. I clearly had control of SZ 158 but at the end of the turn ship purchase goes through instead of being blocked (SZ south of Western USA). I only just noticed this and there is about 12 hrs left on the game clock, so I will wait to submit until the last possible second to give some time for it to be viewed.