In Phoenix Point at the moment we’re building radar stations which then given an instant and uniform detection of areas to explore.
I don’t know if I’m misunderstanding how modern radar works, but I’ve always associated it with the detection of aerial or naval units, not static ground locations. - To that end I’d expect a radar station to pick up a large floating alien (were they called behemoths?), I’d even expect them to detect the location of alien mist, but I wouldn’t expect radar to pick up a haven, and I definitely wouldn’t expect it locate abandoned scavenger sites (unless those barrels are responding to echo location because… lore somehow). I also wouldn’t expect radar to give a uniform range, if you built a radar station (at low elevation) in Chile I would have thought that it should be more effective in the direction of the Pacific Ocean compared to its ability to detect anything on the other side of the Andies.
I realise that a game simplifies things, and that variable or even LoS radar detection would probably be a nightmare to program, and I know that over the horizon radar exists to counter LoS detection that would limited by the curvature of the Earth. But even so I would feel that the construction of Radar towers would make a lot more sense if the aim is to discover land based locations and additionally they could lead to some interesting gameplay mechanics.
Havens could appear at different time points; even in an area where you’ve got coverage it’s not to say that a haven is populated and therefore able to respond at a given time point, they might appear or disappear at different stages of the game depending upon what is happening to them.
Havens could also choose to not respond to the player based on the player’s relationship with their faction.
Discovering the location of scavenger sites could depend upon picking up info/clues to describe that location and/or travelling close to it. (Clues could be gained from havens, from newly recruited soldiers, from interrogations, from single event radio contact made by civilians/soldiers that require aid)
Radar stations could then be left to detect mist and those big floating alien thingamajigs.