earnil Posted September 11, 2017 Posted September 11, 2017 Hi everyone! I'm having lately a problem with doing the INS update. In radar mode, when I press T1, I get the cross, radar mesh disappears, but the WP doesn't change to E (instead of B). And when I press TV to make the fix, I just get back the radar mesh, but the cross is still there and WP position is not updated. For visual fix, when I press T1, WP changes to E and back to B when I press TV, but waypoint position doesn't change. What is the most frustrating is that sometimes it works ok and sometimes it doesn't and I can't really pinpoint what makes the difference. Thanks a lot in advance, any help is appreciated! I assume I'm missing something really obvious...
Hog_No32 Posted September 12, 2017 Posted September 12, 2017 Do you have TERNAV on? Regards Can you switch it off or disable it by any means? I don't think so...
earnil Posted September 12, 2017 Author Posted September 12, 2017 Yes. It's usually in status 2 (when I've been flying over the water for a while for example and I'm nearing coast to do fix on some terrain feature). I haven't tried it when it was in status 5, but then I guess I wouldn't need to do a manual fix in a first place since TERNAV is constantly doing that for me, no?
Hog_No32 Posted September 12, 2017 Posted September 12, 2017 Found the relevant section in the manual: TERNAV can be turned off by inputting 581000 in TAKT. But by default it is on upon startup. Not sure what the use case would be to turn it off though (except in case of malfunction). Cheers, Christian
earnil Posted September 13, 2017 Author Posted September 13, 2017 Ok, so after experimenting some more, I think I found the cause. This is happening only if I set weapon selector rotary switch to RB75/MARK/DYK mode. If I change the setting to any other value, the fix starts working again. I wonder if this is intended behavior, but in any case, it's quite confusing. 1
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