Adjust hold standards speed table

[a-bern]

The icao speed limits table at https://docs.flybywiresim.com/pilots-corner/advanced-guides/flight-planning/holds/#hold-standards should be slightly modified:

Altitude (ft MSL)   Airspeed (KIAS)
<= 14000    230
14001 - 20000   240
20001 - 34000   265
> 34000 .83 Mach

Reference: https://skybrary.aero/articles/holding-pattern

[Valastiri]

Thanks! Took me a minute to see where the changes were. I think instead of using 14001 we might instead use the terminology Above 14000 up to 20000 to increase clarity.

Will create a PR for this unless you open one ahead of time :). Cheers!

[tracernz]

The current table is consistent with the Honeywell A320 FMS documentation so I suggest we retain it.

[Valastiri]

Review provided: https://github.com/flybywiresim/docs/pull/753#pullrequestreview-1323091994

Thanks for looking into the speeds but since they are correct will be closing this issue.

[a-bern]

The current table is consistent with the Honeywell A320 FMS documentation so I suggest we retain it.

I dont get your point. With the current documentation its not clear whether you have to fly at a max speed of 265 or 240 at an altitude of 20000 ft. The table in this documentation talks about „icao speed limits“. And the icao speed limits are very clear on this topic.

Its rather cosmetic/clarification change. Either remove the table and link to the official icao speed table or adjust the fbw documentation.

[tracernz]

We work from the Honeywell A320 FMS documentation which has a slightly different table to Skybrary (perhaps a slightly different interpretation of the ICAO source document). Since this is the FMS we are modelling that is our source of truth, and what the FMS implementation is based off. I do agree that the 20000 is ambiguous, but that is how it exists in their table.. :/