I don't use those mods so I can't say with 100% certainity but I suspect if you head for the approaches to Tokyo Bay you will find shippng heading in from and out to all directions. Seems only logical.
First though, I would stay within 50 miles of that marker (2-3 days unmodded version - modded???) to collect your renown for mission accomplishment-unless the mods you are using have done away with the renown system. Again, I'm not in a position to say for sure.
