PoAdeleted5
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- Mar 12, 2005
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Steve said:I suspect its more for redundancy than enhanced capability. Prices on GPS/comm units are approaching what nav/comms were not too many years ago.
my 2% of a dollar
jdwatson said:If the 430/530 would let you monitor the standby frequencies I wouldn't *have* to have two of them... but I hate "going off freq" to check ATIS or whatever.
larrysb said:I've noticed a lot of newer planes come equipped with dual GPS installation, like 2 GNS430's or a 530 and a 430.
Is there some particular thing you need 2 of them for that you can't do on one? Maybe some kind of VOR/DME approach or something like that?
flyingcheesehead said:Using the Garmin in lieu of DME, you end up without the moving map. If you want moving map + DME, you need two of 'em. Ryan Ferguson had a good writeup about this a while back.
larrysb said:How about a 430 doing the DME job and a hand held on the yoke for the moving map? The moving map being "an aid to situational awareness" anyway.
Is there a case where two IFR approved GPS are required? Or is there another operating condition where only a pair of 430/530 would be satisfactory?
I've also heard that with the apropriate jack installed, the 430 can output serial data to a Garmin handheld, which would seem to help things a lot. My 296 has a much nicer map and terrain feature than a 430. Of course, the 296 is not legal for navigation.
Lance F said:and don't forget that having two 430s/530s allows Jeppesen to charge you even more every month (but those generous guys do give a little discount if you have two in the same plane).
lancefisher said:I think a lot of folks with 2 Garmins keep one current and one a month behind, only paying for one subscription.
lancefisher said:I think the GNS 480 does have that capability. Maybe Apollo was thinking along the same lines as you.
Then again, as reliable as today's avionics are, they do fail now and then and anyone who regularly flies in IMC would be a bit reckless to fly without a second com and nav source in the panel. Handhelds are OK for backup purposes, but unless you normally have the handheld hooked up and programmed you could become real busy if your one and only GPS/MapCom died while on an approach in IMC at a busy airport. Some pilots do fly with their handheld GPS on and ready, but I don't know of anyone who has their handheld comm connected to the antenna and headset while flying with the panel units.
Another issue is dispatchability. With Dave's setup he could complete a multi leg IFR trip if one of the Garmins died enroute. Whether he would might depend on the weather involved.