Yellowbelly,

When did the Garmin 430 become approved as a sole means of navigation?

Far as I know, there is no such thing, when it comes to GPS. I believe that you still have to have an alternate means of navigation for IFR other than GPS. Ney?

Throw me a regulation, por favor...

MTV

MTV:

TSO C146a

Sets the requirements for sole means of navigation including EDE error detection exclusion parameters, RAIM detection and flagging etc. The 430W/530W have to come with documentaion that they do indeed meet the TSO C146a requirements. Without the paperwork (flight manual supplement,etc) , they revert to TSO C129 boxes and would require alternate ground based equipment for certain phases of flight like non-precision approaches.

BTW: This requirement also says that the manual HAS to be in the plane or you are illegal. Don't study it at home and leave it there.

YB

mtv wrote:Yellowbelly,

When did the Garmin 430 become approved as a sole means of navigation?

Far as I know, there is no such thing, when it comes to GPS. I believe that you still have to have an alternate means of navigation for IFR other than GPS. Ney?

Throw me a regulation, por favor...

MTV

Got a interesting email regarding mr.MTV from pilot friend in Alaska ----


Hey 182STOL,

I found out that mtv guy who is pose-ing as some sort of an expert on
all matters in the air and on the ground is actually considered kinda
Bozo by several people in the know. According to that friend up in AK I
told you about, this hotshot could not pass one too many checkrides and
is un-employable up there for professional flying work. My buddy up
there is the same combat veteran category as you (but Navy fix-wing). He
said this guy is known to be kind of a jerk. Apparently he fancys
himself as a big-shot opinion-maker on the internet groups and
inexperienced people listen to him, but the AK guys that actually fly
more than talk don't take him all that serious. Suposedly he is no
longer in Alaska because of the checkride problem. I remember a guy like
that in the early 1990's aviation "usenet" newsgroups named Captain
Zoom. He talked a great game and made himself sound like a real aviator,
but was actually a total idiot. For a while he published a magazine that
trash-talked anyone who disagreed with him, but anyone who paid to
advertise in his magazine got rave reviews from "the editor" Captain
Zoom. Maybe this mtv character is the same guy popping back up as a
back-country bush pilot expert on everything? If that guy has been on
government-sponsored luxury vacations in Laos or Cambodia or Panama or
wherever all over hell you went for 30 years then I might listen to what
he thinks about crash survival. Lots of fake experts and wanna-bees on
the internet chatrooms.

Bill,

Apparently, your reading skills aren't the best. Note that my post was a QUESTION, as in looking for information, which he provided. I then looked it up.

It's called LEARNING, Bill.

And, to Yellowbelly--thanks.

MTV

182 STOL driver wrote:
Got a interesting email regarding mr.MTV from pilot friend in Alaska ----


Hey 182STOL,

Maybe this mtv character is the same guy popping back up as a
back-country bush pilot expert on everything?

(I edited the above quote)

Find out the facts first and ask MTV in a PM before you slam someone in a public forum!! Stuff like this shouldn't be on here. Especially this free website Zane works so hard to creat and maintain. I have the rest of my comments on the Survival Gear thread.

Yellowbelly,

After looking at the tso and the Garmin tech specs, I figured out the deal now--none of our 430's are "W" types, so they don't comply with TSO C146a. I have yet to fly with a 430W unit, so wasn't aware that they had that approval. Glad you brought that up--thanks.

MTV

mtv wrote:Yellowbelly,

After looking at the tso and the Garmin tech specs, I figured out the deal now--none of our 430's are "W" types, so they don't comply with TSO C146a. I have yet to fly with a 430W unit, so wasn't aware that they had that approval. Glad you brought that up--thanks.

MTV

I am considering installing a non W 430. If I do what other radio gear would I need to keep on board?

Bo Man,

With a plain old 430, you just need a CDI with glide slope indicator (for ILS) or an HSI with GS. Everything else is in the 430 box, you just have to be careful how and when you use it.

The RNAV approach plates will usually list 3 different decision heights (MDA or DA) in the table. The LPV line is for WAAS certified equipment only and will get you down to 200 ft AGL. The LNAV/VNAV is for Flight Management Systems with VNAV capable altimeters that most of us don't have. The LNAV line is what you would use for the non-W 430. It will probably get you down to around 400 ft AGL depending on the specific conditions around that airport. One big difference using WAAS and non-WAAS GPS is how you handle alternates. Suppose you fly to your destination, shoot the approach and have to go missed approach. You decide to fly to your alternate, and let's say it has an approach to the VOR on the field to make it easy. With your plain 430, you can use GPS to fly to the alternate, BUT, when you start the approach, you MUST switch modes on the 430 from GPS to VLOC and tune the VOR receiver (NAV 1 in your 430) to the VOR on the field. You shoot the approach with radio signals from the VOR, not GPS.

With WAAS in the 430W, you can fly to the alternate using GPS and shoot the LPV approach to the alternate using GPS all the way. You could even do this if the VOR on the field was NOTAMed Out Of Service, because you are not using the radio facility for guidance. The TSO that specs out sole means of navigation is quite stringent. WAAS receivers are required to be at least 10 times more accurate than "ordinary" ones and the refresh rate is 5 times faster. There is a lot more safety netting in place too when it comes to signal strength and noise. Most Garmin WAAS upgrades required new antenna installations using low-loss coax to meet the certification requirements.

YB

That's probably what I'll end up doing, it will allow me to dump one navcomm and GX55.