Two correctness fixes exposed by a coverage batch where "1 ROUTE130"
near-misses turned out to be catastrophically broken routes (Paris->
Frankfurt routed via Alaska) hidden by IFPS error-masking:
- airway_path now rejects a spliced sub-path that balloons past
SPLICE_MAX_RATIO x the direct distance. At a fragmented FL the graph
could route two nearby fixes the long way around the whole network; that
garbage then showed only 1 (masked) error and beat sane routes in the
monotonic best-tracking.
- route_item15 strips computer-navigation fixes (unnamed ARINC waypoints
whose ident carries a digit, e.g. GT27A) proactively, collapsing
same-airway legs, so IFPS never sees a ROUTE130 designator it would
reject and stop evaluating at.
Net: coverage numbers are now honest (masked garbage no longer counts as a
near-miss); the real blocker is RAD PROF204/205 on upper/FRA routes.
49 tests green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Alexandre
927b7eeea7