The Useful PSA Thread
03-09-2015 | 10:03 AM
#2381
Gets Weekends Off
Joined: Jul 2013
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Agreed. The last 3 airplanes that I flew professionally before I came to 121 didn't even have a GPS in them. We navigated via good old fashioned VOR receivers, and even shot NDB approaches. I quickly learned the RNAV stuff in class, but not knowing it before hand did not hurt me at all.
03-09-2015 | 10:10 AM
#2382
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So what is the psi of the fuel nozzles in cruise??
And to the person who asked. Who said a raim question was on the test? I don't raim is even covered in the ATP written.
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03-09-2015 | 10:12 AM
#2383
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He said it was in recent interview gauge. Do you read?
03-09-2015 | 10:15 AM
#2384
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I don't know exactly what the question asks, but here is what I found that might help. I got this info from the ground school and systems manuals. Are they asking about RAIM or RNP?
RNP
4.0NM - Oceanic
2.0NM - Enroute
1.0NM - Terminal (initial, intermediate, and missed segments)
0.3NM - Approach (final segment)
and you must be within this 95% of the time.
RNP
4.0NM - Oceanic
2.0NM - Enroute
1.0NM - Terminal (initial, intermediate, and missed segments)
0.3NM - Approach (final segment)
and you must be within this 95% of the time.
03-09-2015 | 10:38 AM
#2385
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If you are using GPS RNAV, RAIM is still very much used. The two are interconnected. RAIM ensures the receiver is getting enough satellites for GPS navigation and WAAS/LAAS provide a correction to a signal to allow for more accurate approaches. No RAIM, WAAS is worthless.
03-09-2015 | 11:14 AM
#2387
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From: Extra 300
If you are using GPS RNAV, RAIM is still very much used. The two are interconnected. RAIM ensures the receiver is getting enough satellites for GPS navigation and WAAS/LAAS provide a correction to a signal to allow for more accurate approaches. No RAIM, WAAS is worthless.
I do not believe this is correct. WAAS do not have RAIM, since WAAS uses GEO satellite to send signal ( I believe there is one or two only). RAIM is used by old fashioned GPS and makes sure that the signal from the Satellite is not corrupted. So, it uses t least 5 or 4 plus a barometric altimeter. When the corrupted satellite is to be removed, RAIM requires 6 SATs. 6-1 bad one.
03-09-2015 | 11:23 AM
#2388
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I don't know exactly what the question asks, but here is what I found that might help. I got this info from the ground school and systems manuals. Are they asking about RAIM or RNP?
RNP
4.0NM - Oceanic
2.0NM - Enroute
1.0NM - Terminal (initial, intermediate, and missed segments)
0.3NM - Approach (final segment)
and you must be within this 95% of the time.
RNP
4.0NM - Oceanic
2.0NM - Enroute
1.0NM - Terminal (initial, intermediate, and missed segments)
0.3NM - Approach (final segment)
and you must be within this 95% of the time.
Not sure why they're asking this question either, but, rather be safe than sorry, every question missed is worth 4% for that 80% passing score.
03-09-2015 | 11:34 AM
#2389
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I think this is as close I will get to what may be a correct answer. I remember the RAIM or GPS needs to be accurate to 0.3NM at the FAWP, and that the interrogation is continuous. I also pulled up AC 90-100A which states, as CLT Guy mentioned above that RNAV requires a total system error of not mor than 1NM for 95% of the flight time.
Not sure why they're asking this question either, but, rather be safe than sorry, every question missed is worth 4% for that 80% passing score.
Not sure why they're asking this question either, but, rather be safe than sorry, every question missed is worth 4% for that 80% passing score.
03-09-2015 | 11:39 AM
#2390
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Joined: Dec 2014
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From: CL65
I think this is as close I will get to what may be a correct answer. I remember the RAIM or GPS needs to be accurate to 0.3NM at the FAWP, and that the interrogation is continuous. I also pulled up AC 90-100A which states, as CLT Guy mentioned above that RNAV requires a total system error of not mor than 1NM for 95% of the flight time.
Not sure why they're asking this question either, but, rather be safe than sorry, every question missed is worth 4% for that 80% passing score.
Not sure why they're asking this question either, but, rather be safe than sorry, every question missed is worth 4% for that 80% passing score.
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