DarkStar79 Posted December 17, 2018 Share Posted December 17, 2018 I just have a question here. Isnt the terranav using the radar to know its location? Howcome that even if I have the radar off the terranav still shows 5 on the datapad and updating the terranav system? Do i really need to have the radar on for the terranav system to update? Link to comment Share on other sites More sharing options...
Holton181 Posted December 17, 2018 Share Posted December 17, 2018 The radar altimeter, yes. The ground radar, no. I think. Helicopters and Viggen DCS 1.5.7 and OpenBeta Win7 Pro 64bit i7-3820 3.60GHz P9X79 Pro 32GB GTX 670 2GB VG278H + a Dell PFT Lynx TrackIR 5 Link to comment Share on other sites More sharing options...
corvinus Posted December 17, 2018 Share Posted December 17, 2018 The radar altimeter, yes. The ground radar, no. I think. You mean: I am sure. ;) Only the radar altimeter is needed. Although currently turning of the RHM does not disable the TERNAV system. The RHM points downward, while the PS37 is located in the nose, really two completely different systems. Link to comment Share on other sites More sharing options...
Leadnap Posted December 17, 2018 Share Posted December 17, 2018 You mean: I am sure. ;) Only the radar altimeter is needed. Although currently turning of the RHM does not disable the TERNAV system. The RHM points downward, while the PS37 is located in the nose, really two completely different systems. So just to make sure I can also say "I am sure" - if you stick to barometric low altitude reading does the radar altimeter not emit? --- AJS37 Viggen, F-16C Viper, Adobe Premier. X56 HOTAS, Ryzen 7, GTX 2070S youtube.com/leadnapgaming Link to comment Share on other sites More sharing options...
corvinus Posted December 17, 2018 Share Posted December 17, 2018 I think it will have to emit for the TERNAV to work (barometric alt is useless for that) and also for altitude warnings to work. Should not be too hard to check. Link to comment Share on other sites More sharing options...
Leadnap Posted December 18, 2018 Share Posted December 18, 2018 I think it will have to emit for the TERNAV to work (barometric alt is useless for that) and also for altitude warnings to work. Should not be too hard to check. Right no I understood that - what I am trying to figure out, is if I have the altimeter switched to Barometric, is the radar altimeter radar no longer emitting energy? I am trying to determine what needs to be done for an entirely passive flight. --- AJS37 Viggen, F-16C Viper, Adobe Premier. X56 HOTAS, Ryzen 7, GTX 2070S youtube.com/leadnapgaming Link to comment Share on other sites More sharing options...
corvinus Posted December 18, 2018 Share Posted December 18, 2018 If you want to go EMCON all the way, you can turn off the RHM (somewhere on the right panel in the neighborhood of the oxygen switch). I tried to say that switching to barometric would probably not switch of the RHM, because: 1. It would also disable the height warning function. The latter should be based on RHM always as barometric altitude does not give height above ground in hills. 2. It would disable TERNAV and you would stop getting automatic NAV fixes. Both are a pretty high price to pay for just wanting to see barometric altitude on the HUD. Therefore I concluded that RHM will remain on and thus transmitting. Using the RHM switch should do it though ... Link to comment Share on other sites More sharing options...
Leadnap Posted December 19, 2018 Share Posted December 19, 2018 If you want to go EMCON all the way, you can turn off the RHM (somewhere on the right panel in the neighborhood of the oxygen switch). I tried to say that switching to barometric would probably not switch of the RHM, because: 1. It would also disable the height warning function. The latter should be based on RHM always as barometric altitude does not give height above ground in hills. 2. It would disable TERNAV and you would stop getting automatic NAV fixes. Both are a pretty high price to pay for just wanting to see barometric altitude on the HUD. Therefore I concluded that RHM will remain on and thus transmitting. Using the RHM switch should do it though ... We're on the same page then, I only wondered because I do think about emissions and detection by ground sensors - though this is probably poorly if at all modeled in DCS and thus irrelevant to "play" - if you were doing some real deep strike stuff IRL such considerations would probably matter but especially here it IS a major price to pay if the only simulated result is not having radar ranged altitude on the HUD. --- AJS37 Viggen, F-16C Viper, Adobe Premier. X56 HOTAS, Ryzen 7, GTX 2070S youtube.com/leadnapgaming Link to comment Share on other sites More sharing options...
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