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Is this answer right?

Posted: Sat Aug 15, 2015 10:59 am
by mikec
I'm studying for the IFR knowledge test using Sporty's online course. I came across an answer that seems correct to me, but Sporty's says it is incorrect.

Here is the question:
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Here is the portion of the chart being referenced:
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Note that the question specifically asks for the minimum altitude crossing GYMME. The arrows east and west on GYMME only specify the MEA, not the crossing altitude. If there was a crossing altitude there would be an X flag on the intersection, right? So, if I was previously eastbound at 6,500 my minimum crossing altitude should be 6,500, right? I would want to start a climb to 7,000 when practicable, but the crossing altitude is 6,500. Am I misunderstanding this?

Thanks,
Mike

Re: Is this answer right?

Posted: Sat Aug 15, 2015 11:41 am
by RyanK
The MEA is 7000 for the entirety of BTG-LTJ eastbound. The 6500 doesn't apply since it's only for westbound between GYMME and BTJ.

Re: Is this answer right?

Posted: Sat Aug 15, 2015 11:41 am
by bbuckley
mikec wrote:So, if I was previously eastbound at 6,500 my minimum crossing altitude should be 6,500, right?
I'm not sure how you would be eastbound on the airway at 6500... so I would have said 7000 since from BTG to GYMME eastbound (and the entire segment to LTJ for that matter) the MEA is 7000. Let's see what experts say...

Re: Is this answer right?

Posted: Sat Aug 15, 2015 11:52 am
by Kyle.Sanders
"Lowest altitude for crossing a radio fix beyond which there is a higher MEA is the MEA at which fix is approached. Eg, if 4200 on one side and 4500 on other means 4200 over intersection then climb."
- source: http://nashvillecfi.com/instrument/enroute.html



But if you are on a higher MEA segment and then reach a change in MEA to lower altitude, maintain that higher MEA until reaching the point where the change happens.

In your case, if I was westbound, I would maintain 7,000 until after GYMME.

If I was eastbound, I would maintain 6,500 and start a climb up to 7,000 after GYMME.

Re: Is this answer right?

Posted: Sat Aug 15, 2015 12:01 pm
by RyanK
Kyle.Sanders wrote:If I was eastbound, I would maintain 6,500 and start a climb up to 7,000 after GYMME.
The arrow with the 6500 indicates that it applies to the westbound direction. 7000 is the MEA if you're heading east.

Re: Is this answer right?

Posted: Sat Aug 15, 2015 12:07 pm
by Kyle.Sanders
RyanK wrote:
Kyle.Sanders wrote:If I was eastbound, I would maintain 6,500 and start a climb up to 7,000 after GYMME.
The arrow with the 6500 indicates that it applies to the westbound direction. 7000 is the MEA if you're heading east.
You are correct. I messed it up.

Re: Is this answer right?

Posted: Sat Aug 15, 2015 12:08 pm
by mikec
Ah ... so the arrows indicate eastbound/westbound and not east-of-fix/west-of-fix. Duh! Got it now.

Re: Is this answer right?

Posted: Sat Aug 15, 2015 12:08 pm
by Kyle.Sanders
mikec wrote:Ah ... so the arrows indicate eastbound/westbound and not east-of-fix/west-of-fix. Duh! Got it now.

Yeah, I knew that but it still got me lol