[REQ] PPI and A scope empty station

[tomoose]

Not sure if this has been discussed before.
As we all know, the surface search radar equipment is represented throughout your career but only works when you actually 'install' the kit at some point during the war.

Would it be possible to alter the graphics (i.e. place a 'metal' plate over the scopes) to show the stations as being non-operative early in the war and have the game revert to the normal scope stations once you actually install the radar at Base?

Hope that makes sense. I seem to remember one of the earlier sub games (Silent Service 2 I think) had that in that the station didn't have the scopes etc until later in the war when the sub acquired surface search radar.