- PASS overview permits fixed detail for no-location monitoring point
- PASS same identities with changed coordinates/status invalidate engine plan
- PASS non-drawn device selection cancels previous terrain work
- PASS closing detail through level change cancels terrain work
- PASS hidden parent gates associated devices when abnormal linkage is unavailable
- PASS rapid A to B inherits an unapplied device tier
- T48 linkage invariants: passed
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