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#11
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Garmin 430 rquestion- does the approach always have to be activatedvia "activate approach"?
Thomas Borchert wrote:
Terence, Well suppose I am enroute and approaching the SGD VOR. At this point I am getting close to my destination and want to setup the KCCR VOR approach which starts at the CCR IAF. If I load and activate the approach a megenta line will immediately be drawn from my present position to CCR. Want I want is the route SGD, CCR ... KCCR. I see. In that case, what's wrong with loading the procedure and then waiting with activation until passing SGD. Also, upon rereading the 430 manual I noticed that activating vectors-to-final will always get you to the FAF. I could find no mention of the automatic activation mentioned by someone. However, automatic CDI switching (to VLOC) will only happen on an activated procedure, it seems. VLOC is only for ILS and LOC, not RNAV |
#12
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Garmin 430 rquestion- does the approach always have to be activatedvia "activate approach"?
On 02/16/08 10:46, Thomas Borchert wrote:
Terence, Well suppose I am enroute and approaching the SGD VOR. At this point I am getting close to my destination and want to setup the KCCR VOR approach which starts at the CCR IAF. If I load and activate the approach a megenta line will immediately be drawn from my present position to CCR. Want I want is the route SGD, CCR ... KCCR. I see. In that case, what's wrong with loading the procedure and then waiting with activation until passing SGD. Also, upon rereading the 430 manual I noticed that activating vectors-to-final will always get you to the FAF. I could find no mention of the automatic activation mentioned by someone. However, automatic CDI switching (to VLOC) will only happen on an activated procedure, it seems. ... and the localizer frequency must be in the active window -FYI. -- Mark Hansen, PP-ASEL, Instrument Airplane, USUA Ultralight Pilot Cal Aggie Flying Farmers Sacramento, CA |
#13
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Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?
Sam,
VLOC is only for ILS and LOC, not RNAV I know. However, procedure activation is treated as standard in the manual, contrary to what you alluded to. There is no mention of "automatic activation" I could find. Could you kindly point me to it? -- Thomas Borchert (EDDH) |
#14
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Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?
On Sat, 16 Feb 2008 19:46:19 +0100, Thomas Borchert
wrote: Terence, Well suppose I am enroute and approaching the SGD VOR. At this point I am getting close to my destination and want to setup the KCCR VOR approach which starts at the CCR IAF. If I load and activate the approach a megenta line will immediately be drawn from my present position to CCR. Want I want is the route SGD, CCR ... KCCR. I see. In that case, what's wrong with loading the procedure and then waiting with activation until passing SGD. Not really biggie, but it seems redundant. Why am I activating? What does it do? I just passed SGD and I'm en route to CCR with a nice magenta line plotted between the two. Activating the approach will redraw a magenta line from my current position to CCR. As I said, I'm confused about what "activate" actually does. Is it just a shortcut to get me on the approach or does it put the 430 into some sort of magical approach mode? Or to put it another way, if I load but don't activate, am I missing something? Also, upon rereading the 430 manual I noticed that activating vectors-to-final will always get you to the FAF. One of the annoyances of VTF is that it erases all the waypoints before the FAF. I'm not that experienced, but when ATC has given me vectors, it's usually to a fix before the FAF. The bottom line is I don't use VTF, it's safer to pick an IAF, and then activate the appropriate leg manually once ATC has issued vectors onto the published approach. I could find no mention of the automatic activation mentioned by someone. However, automatic CDI switching (to VLOC) will only happen on an activated procedure, it seems. I'll have to read about that. I wasn't aware that the unit automatically switches from VLOC to GPS or vice versa. |
#15
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Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?
Mark,
... and the localizer frequency must be in the active window -FYI. Yep, but the unit will remind you to put it there 3 (?) miles from the FAF. -- Thomas Borchert (EDDH) |
#16
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Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?
Terence,
I wasn't aware that the unit automatically switches from VLOC to GPS or vice versa. Me neither ;-) It switches from GPS to VLOC only, on the condition that the VLOC frequency is active, once you are kind of established on the final approach course. Also, it switches "gradually", so as to not make the autopilot go berserk. -- Thomas Borchert (EDDH) |
#17
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Garmin 430 rquestion- does the approach always have to be activatedvia "activate approach"?
Thomas Borchert wrote:
Sam, VLOC is only for ILS and LOC, not RNAV I know. However, procedure activation is treated as standard in the manual, contrary to what you alluded to. There is no mention of "automatic activation" I could find. Could you kindly point me to it? No, there is no approach activation for ILS or LOC. Approach activation, as defined for *RNAV* occurs 2 miles from the FAF. When you select a LOC or ILS, you instead receive an advisory message cautioning you that RNAV is for monitoring only. |
#18
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Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?
Sam,
When you select a LOC or ILS, you instead receive an advisory message cautioning you that RNAV is for monitoring only. Yes, but you can (and should, per the manual) activate them. So the question remains, what exactly does that do? In my experience, it starts both sequencing of the waypoints in the procedure and the change in CDI sensitivity. And from my experience, same goes for an RNAV approach. The 430 just continues to fly the original flightplan if you don't make it fly the approach - by activating it. -- Thomas Borchert (EDDH) |
#19
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Garmin 430 rquestion- does the approach always have to be activatedvia "activate approach"?
Thomas Borchert wrote:
Sam, When you select a LOC or ILS, you instead receive an advisory message cautioning you that RNAV is for monitoring only. Yes, but you can (and should, per the manual) activate them. So the question remains, what exactly does that do? In my experience, it starts both sequencing of the waypoints in the procedure and the change in CDI sensitivity. And from my experience, same goes for an RNAV approach. The 430 just continues to fly the original flightplan if you don't make it fly the approach - by activating it. I agree that the manual says to activate a previously loaded approach. But, it is overkill and unnecessary. En route to terminal sensitivity occurs when passing within 30 miles of the airport reference approach, whether or not an approach is loaded., *provided* the destination airport is the final waypoing in the flight plan. Once flying an approach it will activate (approach sensitivity and approach RAIM) when reasonably on course and passing inbound 2 miles prior to the FAF. You can hit the "activate approach" option all day long once on an approach flight plan and inside the IAF, and nothing will happen until you reach 2 miles from the FAF. And, the same will happen at 2 miles from the FAF without ever pressing the "activate approach" option. Try it in the trainer on any RNAV (GPS) IAP (or overlay IAP). |
#20
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Garmin 430 rquestion- does the approach always have to be activated via "activate approach"?
On Sat, 16 Feb 2008 14:17:02 -0800, Sam Spade
wrote: I agree that the manual says to activate a previously loaded approach. But, it is overkill and unnecessary. En route to terminal sensitivity occurs when passing within 30 miles of the airport reference approach, whether or not an approach is loaded., *provided* the destination airport is the final waypoing in the flight plan. Once flying an approach it will activate (approach sensitivity and approach RAIM) when reasonably on course and passing inbound 2 miles prior to the FAF. You can hit the "activate approach" option all day long once on an approach flight plan and inside the IAF, and nothing will happen until you reach 2 miles from the FAF. And, the same will happen at 2 miles from the FAF without ever pressing the "activate approach" option. Try it in the trainer on any RNAV (GPS) IAP (or overlay IAP). Thanks Sam. Your response agrees with my simulator observations and clears up my confusion. |
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