NYGM - Radio contacts - Question

[lumat83]

Hi all

I've two questions about radio contacts in NYGM mod

1- I would like to restore radio contacts on the map (It seem to me more realistic, because in reality, other Uboats and BdU send to uboat the known convoys roads and others spotted ships).
But I don't want on the map all contact spotted in visual by my officer. I want to determine myself their road, speed ...

To do that, I've to load the "Restore Gods Eye View" and activate in the game options "No map contact update". Ok ?

2- My other question is about the contact.cfg file.
I see :

[ContactSettings]
; Contact settings

Display Range To Opportunity Radio Contacts=300 ;[>0] kilometers
Display Range To Important Radio Contacts=1500 ;[>0] kilometers
Decay Time For Important Radio Contacts=172800 ;[>0] seconds
Decay Time For Opportunity Radio Contacts=32400 ;[>0] seconds

I think "Display range" is the range from my uboat the contacts appear on the map. But is it the minimum or the maximum ?
For example, The opportunity radio contacts will appear at least 300 Kms or between 0 and 300 kms ?
If it is the maximum how set the minimum range ? (For example if I want the contacts appear between 100 and 300 kms)

At last, decay is the time before the contact disappear from the map ?

First, excuse my english. Sometimes it is a little rough
Second, thanks for your help