Check your GPS airspace alerts
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Originally Posted by Nipper2
The US origins of the device are evident in the Garmin Manual which has no mention of any Class D
Class D is prevalent in the US.
Plus the Garmin GPS 96C manual does document Class D. http://www.mypilotstore.com/mypilots...nersManual.pdf
Avoid imitations
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I use GNS 430 and 530. I switched off all the airspace alerts because I found them a distraction and confusing at times.
On a new route I draw a biro line on the 1/2 mil chart and look up the airspace boundaries and possible "gotchas" before departure. I use the GNS "moving map display" (if it can be called that as it lacks a lot of detail) as my "finger on the map". I check it follows the same track as that drawn on the chart (and that the tracks and distances tally) before relying on it for anything.
On a new route I draw a biro line on the 1/2 mil chart and look up the airspace boundaries and possible "gotchas" before departure. I use the GNS "moving map display" (if it can be called that as it lacks a lot of detail) as my "finger on the map". I check it follows the same track as that drawn on the chart (and that the tracks and distances tally) before relying on it for anything.
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Hi Lee,
Do your airspace warnings stay on the screen until you touch them? Mine seem to disappear on their own after about 10 seconds if you don't touch them. If there's a setting to keep them onuntil dismissed I'll be delighted.
Do your airspace warnings stay on the screen until you touch them? Mine seem to disappear on their own after about 10 seconds if you don't touch them. If there's a setting to keep them onuntil dismissed I'll be delighted.
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Gomrath
I'm obviously being dim. Where does it mention Class D in respect to airspace alerts specifically? I'm looking on page 108 and can see no specific mention of Class D.
Am I missing something?
There is also no specific mention of Class A anywhere that I can find. As far as I can tell the device depicts class A down at surface level (London and Jersey TMR/CTA) but does not show airways. No problem for my sub 5000' VFR flying.
I'm obviously being dim. Where does it mention Class D in respect to airspace alerts specifically? I'm looking on page 108 and can see no specific mention of Class D.
Am I missing something?
There is also no specific mention of Class A anywhere that I can find. As far as I can tell the device depicts class A down at surface level (London and Jersey TMR/CTA) but does not show airways. No problem for my sub 5000' VFR flying.
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Yes. I see that, but when you go to the page to switch the alerts on and off (which is what we are talking about here), no mention of Class D. It's the same on the menu in the actual device.
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This is one of the things that would be covered in a "Correct Usage of GPS" nav module, if there were one officially.
Its always a good idea to tinker with every setting so that you know exactly what your GPS is going to be warning/not warning you about.
Its always a good idea to tinker with every setting so that you know exactly what your GPS is going to be warning/not warning you about.
Perhaps a cheap AWARE updated monthly free off the web would be a safer bet ?
It's ~£150 for the UK basic version & doesn't take up much cockpit space. As a bonus you get nav position and direction on a moving CAA Chart. My nav is otherwise paper map & pen !
The squeaker can be muted and any visual warnings are very relevant, flying here pretty close to Gatwick.
mike hallam
It's ~£150 for the UK basic version & doesn't take up much cockpit space. As a bonus you get nav position and direction on a moving CAA Chart. My nav is otherwise paper map & pen !
The squeaker can be muted and any visual warnings are very relevant, flying here pretty close to Gatwick.
mike hallam
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Originally Posted by Nipper2
Yes. I see that, but when you go to the page to switch the alerts on and off (which is what we are talking about here), no mention of Class D. It's the same on the menu in the actual device.
It certainly has nothing to do with your previous comment regarding the "US origins".
The US origins of the device are evident in the Garmin Manual which has no mention of any Class D
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It seems to me that the Aera500 even with updated Jeppesen database does not know about class A airways....as you point out the alert options allow for classes B, C, D etc...but not Class A....unless I am missing something??
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A device which warns "airspace ahead within ten minutes" isn't a lot of use around the south east ... as it's pretty well always saying that there is a sort of tendency to ignore it.
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I use an Airbox 5+ and it's pretty accurate regarding airspace. If you run up the river Trent past Newark/Gainsborough/Scunthorpe you are right on the edge of Donny's class D and it tracks perfectly. The device uses a half mil map on the display. I'm suprised by the 'constant bleeping' comment, can't say that mine does. I fly from a CMATZ so it would be blaring all the time but it doesn't. You can turn it off as well, can't remember how to do it on the device but the quickest way is just to stick a mini jack in the audio out.
Our club has just bought two SkyDemons so I'll be giving those a good thrashing soon to see if there's any advantage.
Our club has just bought two SkyDemons so I'll be giving those a good thrashing soon to see if there's any advantage.
Last edited by thing; 14th May 2012 at 07:44.
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In panel-mounted IFR GPS, Class A airspace is not systematically depicted on moving maps and airspace alerting is not systematically provided.
The databases used for navigation and mapping in these units use the ARINC 424 standard, and I think that does not allow for Class A coding. I think there's a historical reason for this - remember there is no Class A at levels below FL180 in the USA, and there is little to map, since it's all Class A up to F600.
Some UK Class A is mapped where it is a TMA, because you can code TMAs, but no Class A airways are mapped as airspace (only route lines).
Sorry for the following use of capitals: YOU ABSOLUTELY MUST NOT DEPEND ON ALERTS FROM A GPS FOR CONTROLLED AIRSPACE AVOIDANCE. I don't know about the various handheld gadgets and software.
The databases used for navigation and mapping in these units use the ARINC 424 standard, and I think that does not allow for Class A coding. I think there's a historical reason for this - remember there is no Class A at levels below FL180 in the USA, and there is little to map, since it's all Class A up to F600.
Some UK Class A is mapped where it is a TMA, because you can code TMAs, but no Class A airways are mapped as airspace (only route lines).
Sorry for the following use of capitals: YOU ABSOLUTELY MUST NOT DEPEND ON ALERTS FROM A GPS FOR CONTROLLED AIRSPACE AVOIDANCE. I don't know about the various handheld gadgets and software.
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Thanks 421C...I do fly with an IFR approved GPS TSO146a (GNS430W) with current database....the 430 does depict the Airway...although it refers to airspace type as unknown and gives no alerts or information about it.... I don't rely on airspace alerts......however I would prefer to have ALL relevant airspace depicted on the screen...I like to have my Aera500 on the yoke as a UPS backup...and it does not depict the airway....it seems to me this is something that Garmin/Jepp can fix given enough will... AQ
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I'm pretty certain my Aera shows class A / airwys under the label "Airway Airspace" and the warnings pick it up if you have "Euro Airways" enabled.
G
G
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Sorry for the following use of capitals: YOU ABSOLUTELY MUST NOT DEPEND ON ALERTS FROM A GPS FOR CONTROLLED AIRSPACE AVOIDANCE. I don't know about the various handheld gadgets and software.
G
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I think PocketFMS was the first to show the UK Class A airways correctly.
I thought all Garmins from 396 onwards also showed the UK Class A airways, so I'd be surprised if the Area was reverting back to the old depiction? Genghis is probably correct in that they can be shown but are called something other than "Class A" in the menus.
I thought all Garmins from 396 onwards also showed the UK Class A airways, so I'd be surprised if the Area was reverting back to the old depiction? Genghis is probably correct in that they can be shown but are called something other than "Class A" in the menus.