Except that it's done all the time, particularly in the terminal environment.  That's the first part.  The second part is that a plane's TCAS has to feel "threatened" before it sends off an RA.  It may set off a TA, but it's simply informational.

 

Proper control would dictate several things:

1. 1000' separation is sufficient in just about all environments (yes, there are exceptions).
2. ATC has informed the climbing crew of the reason for the climb restriction: "Climb and maintain 9000 - crossing traffic at 10,000."
3. Crew A was informed of Crew B's location and vice versa.

RAs will only be set off if TCAS determines that there's a possibility for a collision.  A high rate of climb, which is often something that comes from using VNAV, could certainly fool TCAS into triggering an RA where one isn't necessary.  As such, it fits that Matt is suggesting V/S in that situation.

 

It's a well known issue in the community:

http://www.skybrary.aero/bookshelf/books/2019.pdf

 

"In order to reduce the number of RAs caused by high vertical rates before level-off, ICAO in November 2008 published a provision recommending the reduction of vertical rates to 1500 ft/min or less in the last 1000 feet before level-off, when the pilot is made aware of another aircraft at or approaching an adjacent flight level, unless instructed by ATC to maintain a certain vertical rate."

 

Well then - thanks a lot for the clarification, the proper info here and thi link here

http://www.skybrary.aero/bookshelf/books/2019.pdf

 

Really appreciated!

Except that it's done all the time, particularly in the terminal environment. 

[...]

http://www.skybrary.aero/bookshelf/books/2019.pdf

 

"In order to reduce the number of RAs caused by high vertical rates before level-off, ICAO in November 2008 published a provision recommending the reduction of vertical rates to 1500 ft/min or less in the last 1000 feet before level-off, when the pilot is made aware of another aircraft at or approaching an adjacent flight level, unless instructed by ATC to maintain a certain vertical rate."

 

Sorry - i could not edit my previous post just above anymore - so one new one:

Just read through the pdf.file and now fully understand what was lined out by Matt in #27 above.

Thanks a lot again gents for the clarification and all the info!

And as pointed out already:

Always great to have some decent and informative discussions!

Great!

... from now on also going to judiciously use V/S temporarily every now and then under certain situations while in climb.

:wink: