Charted IFR Altitudes
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- Опубликовано: 4 авг 2024
- This lesson explores the different types of IFR altitudes charted on an Enroute Low Altitude Chart.
The types of altitudes most commonly found on the low altitude chart are the Minimum Enroute Altitude (MEA), Minimum Obstacle Clearance Altitude (MOCA), Minimum Crossing Altitude, Minimum Reception Altitude, Maximum Authorized Altitude, and Off Route Obstruction Clearance Altitude (OROCA).
The MEA is depicted above the route segment it is valid for and is show in thousands of feet. When flying at MEA you are guaranteed obstacle clearance of 1000ft in non-mountainous terrain or 2000 ft in mountainous terrain. You are also guaranteed the ability to receive all navigation aids required to fly the depicted route.
MOCAs are charted much the same was as an MEA, only they are preceded by an asterisk. A MOCA will guarantee the same obstacle clearance as a MEA, however it only guarantees navigation signal coverage within 22NM of the nearest NAVAID that defines the route. That means if your NAVAIDS are 60 miles apart, there is an 18 mile navigational signal gap in the middle of the route if flying the MOCA.
Minimum Crossing Altitudes are shown using a flag with an X in the middle and the text “MCA” with altitudes and routes below. The minimum crossing altitude is the minimum altitude at which you can cross a fix, and is usually associated with a change in MEA at the fix.
Minimum Reception Altitudes are shown the same was as an MCA, however they have an “R” in the flag to denote reception. A minimum reception altitude is specified any time there is an intersection or fix which requires a certain altitude so you can receive all of the NAVAIDS that define the fix.
OROCAs are basically the same as the Maximum Elevation Figure (MEF) found on a VFR sectional. The main difference is that they will give you IFR clearances of 1000ft or 2000ft depending on the terrain. OROCAs are to be used when planning RNAV or GPS flights which do not stay on defined airways. Flying at the OROCA guarantees obstacle clearance within the quadrangle, however it does not guarantee any navigational reception or communications reception.
I hope this lesson helps!
What a great video. Plain English and to the point.
Thank you for making these videos. Helping explain some of the "dry" reading in the various IFR manuals.
I really like how you spoke slower to allow me to absorb everything you were saying. I am usually watching Sporty's online training course as a supplement to the rest of my training and they talk so fast that I am constantly having to rewind which is very frustrating at times. Thank you very much for the great video and keep up the great work!
I like these "quick lessons" as someone with a bit of ADD it's tough to sit down and study for long periods of time. With these I watch one or two a day to keep my IFR knowledge up. Keep them coming!
a bit of ADD to read some words? And yet it does not interfere with your Instrument flying? - hahaha
@@Homoskedastic1 ADD makes for the best instrument pilots. Gotta check this now this now this now this now repeat 😆
you saved me money having to pay fro my instructor to teach me and helped me pass the nav section on my cpl exam. Thanks
Great video! Thank tou so much for the clarifications. Really helpful!
This is exactly what I was looking for. Cheers!
Great video, I'm training to be a flight dispatcher and this was extremely helpful.
the best video in youtube for ifr low chart , thank you bro!
Excellent video. Was very helpful for me to learn this stuff. Thank you.
Thanks for the new video Will and sharing the knowledge. Hope you'll be making a few more!
Thanks for your support! I'm already working on another video now!
Thanks for the video! Much appreciated.
You explained everything in good detail, nice voice tonality ...thanks a lot.
In your information section you have a common misconception of the OROCA. According to the Instrument Procedure Handbook (FAA-H-8083-16) page 2-27 OROCAs are intended primarily as a pilot tool for emergencies and SA. OROCAs depicted on en route charts do not provide the pilot with an acceptable altitude for terrain and obstruction clearance for the purposes of off-route, random RNAV direct flights in either controlled or uncontrolled airspace.
Thanks, short and simple.
exactly what I needed ! thank u!!!!
Looking forward to more lessons! Definitely subscribing! :)
Very helpful indeed. Thank you very much.
Many thanks guys.
Thank you very much for this amazing class! Very good! This helped me a lot on my studies
Excellent video!!!
Thank you very much for this video.
Wow!!! I liked this video a lot. Best explained En Route Chart
Very helpful. Thanks!
Thanks for the video!
Great Video! Thanks
Excellent description
Well put, thank you!
Thank you for your videos
Thank you for explaining it so fine.
:)
Thanks a lot Captain.
Great stuff.
Great explanation !
Very helpful. Thanks
Nice my friend... Thank you so much
Good video. Thanks for making it
Fantastic video, you explained all of this very well. Also, your voice is very soothing, like an ASMR video XD
Excellent video
Thank you for video..
Best learning videos
very clear illustrasion
wow thanks a lot ! now i know whats going on in the class :D thanks !
Very informative and well spoken. But please use a heavier font or bolder type to write with. I found myself rewinding, just to see movement of any kind in order to locate where you were teaching.
Thank you very much for your help. Very Clear. I would like to see also a video doing a flight planing from "0" to have an idea of all the deatails. Once again thank you so much.
Great video! thanks
+Reda Mohamed Thanks for watching!
Thank you
amazing
nice and helpful👍👍👍thanks men
One thing is wrong, when you read MCA, the first victory airway is where you are going to, instead your current location, for example V21 9300 N, means if you are going to V21 North, the minimum crossing altitude is 9300, regardless where you from
Thanks. Could you also mention about the horizontal limits for MOCA, MEA and MORA.
Thank you bro
The minimum en-route altitude (MEA) is the altitude for an en-route segment that provides adequate reception of relevant navigation facilities and ATS communications, complies with the airspace structure and provides the required obstacle clearance. (ICAO Doc 8168 - PANS-OPS)
But you are saying it doesnt provide comunications.
nice video keep it up. can you do a high level en route chart?
I may have missed this, so please understand. Are the altitudes AGL or MSL?
Thank you
Thank you. That helps
If there is no MOCA displayed, can we consider MOCA = MEA?
Dear sir your vedio is very much interesting , kindly make a vedio on domestic and international manual operational flight planning
You say there are no MRA’s depicted here, but doesn’t MENAR intersection on V365-536 northwest of the BZN VOR have an MRA? So the MRA is 9200ft going northwest on the airway, right?
Thats an MCA. Notice the "X". The MRA has a "R"
You explained everything in good detail, nice voice tonality ...thanks a lot.
Good video. Thanks for making it
+Drew Smith Thank you!
+Drew Smith Thank you!