Ambiguity of visual contact.

[Polak2]

One thing in DW to me feels not quite right (or not fully understood) and that is ambiguity of visual surface contacts.
Perhaps if the contact is sensed from the deck of the own unit (and it is beyond visual range) then double positions of the contacts/targets are justifiable. But what if I send my helicopter right over the contact and how it is possible that it still remains ambiguous after fly over?
Is there a range at which the contacts are visible and ambiguity or double positions are present/absent. Is this something to do with the settings? How the visibility is modeled in this sim and what are they depend upon (weather, equipment used etc, etc)? Thank you.