visual approaches: direct the numbers, clearances from the downwind - #967
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- DTN (LDTN/RDTN with a turn direction) sends the aircraft direct to the assigned approach runway's threshold; DTF direct to the arrival airport. spoken forms: "turn left direct the numbers", "proceed direct the field". works before or after a visual approach clearance. (mmp#880) - when the abeam projection onto the reference route is behind the aircraft (a downwind), a visual approach clearance now joins the route at a point downwind of the aircraft instead of refusing: it continues ahead, turns in to that fix, and flies the route inbound, per the suggestion in mmp#882. includes a regression test. - reword the synthesis-failure refusal: "we don't know runway X" now reads "we're not in position for the visual to runway X"; the old text implied a data problem when the issue is geometry
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Two visual-approach improvements:
Direct the numbers / direct the field (Add support for "proceed|turn direct the numbers" (before or after visual approach clearance) #880):
DTN(andLDTN/RDTNwith a turn direction) sends the aircraft direct to the assigned approach runway's threshold;DTFdirect to the arrival airport. Spoken forms: "turn left direct the numbers", "proceed direct the field". Works before or after a visual approach clearance.Visual clearances from the downwind (Allow clearing aircraft on a downwind for a visual approach #882): when the abeam projection onto the reference route is behind the aircraft, the clearance now joins the route at a point downwind of the aircraft — it continues ahead, turns in to that fix, and flies the route inbound from there — rather than refusing. This follows the approach suggested in the issue.
Also rewords the synthesis-failure refusal from "we don't know runway X" (which reads as a data problem) to "we're not in position for the visual to runway X".
Fixes #880
Fixes #882