Bug#956016: Add Flight Levels

classic Classic list List threaded Threaded
3 messages Options
Reply | Threaded
Open this post in threaded view
|

Bug#956016: Add Flight Levels

積丹尼 Dan Jacobson
X-debbugs-Cc: [hidden email]
Package: units
Version: 2.19-1
Severity: wishlist
File: /usr/share/units/definitions.units

Add https://en.wikipedia.org/wiki/Flight_level
1 FL = 1 hectoft = 1e2 ft

By the way one wants to write e.g., FL310, not 310FL, but nevermind.

Reply | Threaded
Open this post in threaded view
|

Bug#956016: Add Flight Levels

Adrian Mariano
On Mon, Apr 06, 2020 at 04:00:15PM +0800, 積丹尼 Dan Jacobson wrote:

> X-debbugs-Cc: [hidden email]
> Package: units
> Version: 2.19-1
> Severity: wishlist
> File: /usr/share/units/definitions.units
>
> Add https://en.wikipedia.org/wiki/Flight_level
> 1 FL = 1 hectoft = 1e2 ft
>
> By the way one wants to write e.g., FL310, not 310FL, but nevermind.

You can, of course, write "FL 310" if you like.  I thought about
allowing prefix units like this, most common for currency, but decided
against it.  

I've added the following:

flightlevel            100 ft        # Flight levels are used to ensure safe
FL                     flightlevel   #   vertical separation between aircraft
                                     #   despite variations in local air
                                     #   pressure.  Flight levels define
                                     #   altitudes based on a standard air
                                     #   pressure so that altimeter calibration
                                     #   is not needed.  This means that
                                     #   aircraft at separated flight levels
                                     #   are guaranteed to be separated.
                                     #   Hence the definition of 100 feet is
                                     #   a nominal, not true, measure.

Reply | Threaded
Open this post in threaded view
|

Bug#956016: Add Flight Levels

積丹尼 Dan Jacobson
In reply to this post by 積丹尼 Dan Jacobson
>>>>> "AM" == Adrian Mariano <[hidden email]> writes:
AM> You can, of course, write "FL 310" if you like.  I thought about

OK, maybe add a note about that in the comment,

AM> flightlevel            100 ft        # Flight levels are used to ensure safe
AM> FL                     flightlevel   #   vertical separation between aircraft

(even though indeed the man page has the "2 liters" example,)
as all pilots put the FL in front. Also mention "yes, add quote marks".