Chart Query
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Joined: Oct 2001
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From: EGKK
Chart Query
Why on this SID chart (DVR6J from 09R at LHR) is it necessary to state an altitude restriction of "At 6,000" at 5d before DET, when an identical altitude restriction on this SID already exists at 16d before DET?
The departure is already capped at 6,000ft, so it seems a bit pointless as you can't climb again until cleared anyway. Same applies for the departure from the 27's (visible also on this image on the easterly track into DET) which has the 6,000ft restriction repeated at 29d and 5d.
Is it just to make doubly sure that pilots won't continue to climb above 6,000?
The departure is already capped at 6,000ft, so it seems a bit pointless as you can't climb again until cleared anyway. Same applies for the departure from the 27's (visible also on this image on the easterly track into DET) which has the 6,000ft restriction repeated at 29d and 5d.
Is it just to make doubly sure that pilots won't continue to climb above 6,000?
Joined: Jan 2006
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From: Oklahoma
Not sure why it is on there more than once, but those are minimum altitudes, not maximums. (I'm pretty sure) I've never read international charts like that. Don't really know why they would put a maximum altitude if its a SID.
Joined: Oct 2000
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From: Somewhere on a dodgy name badge
Probably due to the number of level busts previously in the London TMA. The 6000 ft and not FL 60 constraint is emphasised on all departures from the London airports. Equally if it is a 5000ft constraint it is emphasied.
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Joined: Oct 2001
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From: EGKK
Originally Posted by -IBLB-
Can it be to show that you have to be at 6000' at d16 and have to stay at 6000' till d5?
Joined: Jun 2001
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From: Hampshire UK
It is my educated guess that the 6000ft restriction at DET DME 5 is for RTF fail purposes, to ensure that an aircraft experiencing RTF failure does not climb to FPL level before this point, to ensure separation from conflicting routes.
