RNAV waypoint meanings and decodes
Can anyone explain the procedure for decoding RNAV waypoints on sid, stars and approach charts. I'm aware that some have direct meanings (centre fix etc) but do they all? is there a decode document or format?
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skyhigher:
Can anyone explain the procedure for decoding RNAV waypoints on sid, stars and approach charts. I'm aware that some have direct meanings (centre fix etc) but do they all? is there a decode document or format? |
I believe this is country-specific.
In the UK, for example, many points don't have names, but have identifiers which can be decoded. Typically, the first two letters are the last two letters of the airport's ICAO code. For the intermediate or final approach fix, this is followed by the runway identifier, then the letter I (intermediate), or F. For example, TE26F is the final approach fix for runway 26 at Exeter (EGTE). The missed approach point, if it coincides with a runway threshold is, typically coded as RWYxx, e.g. RWY26 for runway 26 at Exeter. If it's not at a runway threshold, it is coded as MAxx, e.g. MA02 for runway 02 at Shoreham. Points on the missed approach are coded such that the first two letters are the last two letters of the ICAO code, this is followed by the letter M, then a number which I believe indicates the order in which the points are flown over. For example, the first (and only) point on the missed approach for runway 26 at Exeter is TEM01. The plates I'm refering to can be found here for Exeter and here for Shoreham. I'm not 100% sure that what I've quoted can be applied in 100% of cases in the UK, but it's certainly UK-specific. I don't know if other countries employ similar coding or not. Do you need to know any of this to be able to fly the approach? No - you just follow what the plate tells you to do. FFF -------------- |
• RX – runway extension fix
• FA – VFR final approach fix • CF – final approach course fix • FF – final approach fix • IF – initial approach fix • OM – outer marker • MM – middle marker • IM – inner marker • BM – back course marker • MD – minimum descent altitude • A – (+ an alpha) step down fix • RW – runway threshold • MA – missed approach point other than RW • TD – touchdown point inboard of RW. Alpha suffixes are also DME points. Eg. D095L would be 12DME (L = 12th letter) on the 095 radial. |
ImbracableCrunk,
Interesting list.... do you have a reference? FFF ---------- |
D095L would be 12DME (L = 12th letter) on the 095 radial. PS: Not applicable to the nerds who fly A380s with their QWERTY keyboards. :} |
Interesting list.... do you have a reference? FFF ---------- |
Thanks!:ok:
FFF --------- |
To expand Imbracable's list:
Path Terminators RNAV Procedure Coding Arc to a Fix AF Course to an Altitude CA Course to a DME Distance CD Course to a Fix CF Course to an Intercept CI Course to a Radial Termination CR Direct to a Fix DF Fix to an Altitude FA From a Fix for a Distance FC From a Fix to a DME Distance FD From a Fix to a Manual Termination FM Racetrack Course Reversal (Alt Term) HA Racetrack (Single Circuit - Fix Term) HF Racetrack (Manual Termination) HM Initial Fix IF Track to a Fix TF Procedure Turn PI Constant Radius Arc RF Heading to an Altitude VA Heading to a DME Distance VD Heading to an Intercept VI Heading to a Manual Termination VM Heading to a Radial Termination VR Initial Fix IF Track to a Fix TF Procedure Turn PI Constant Radius Arc RF Heading to an Altitude VA Heading to a DME Distance VD Heading to an Intercept VI Heading to a Manual Termination VM Heading to a Radial Termination VR |
Arinc 424 RNav decodes
Skyhigher,
Try a google search for the above reference. There are several sites that have free Powerpoint, slightly outdated details of the Arinc 424. The definitions in it do not change. Arinc will provide the latest for $250. If you don't have any luck PM me and I will send a link I used in the past. Standardset |
triple F`s post.
. . .so MH28F . . . ?
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