(GWX) Good Hunting Places For Different Flotillas In Different Time?

[peterloo]

The main question is shown in the title
"QUESTION CONCERNING GOOD HUNTING PLACES FOR DIFFERENT FLOTILLAS IN DIFFERENT TIME" in GWX mod

I've tried the flo. located in the black sea and also Indonesia. But it seems that there are almost no traffic in Black Sea, and I hardly find small motor boats and sunk them all with MG gun. In Indonesia, there is nothing better. I find 2 convoys near a enemy port, where I think that there is heavy naval traffic. For other places, almost empty.

I don't want to use Spysat (although I've got one handly and can be activated in anytime I want to). Can you kindly tell me where the big fishes are?

Thanks in advance