航跡|こうせきkouseki[0]heiban (flat)

1. nounwake (of a ship or aircraft)
2. nounflight path

No synonyms are listed, so 航跡 stands alone: use it for the wake trailing behind a ship or aircraft, or for an aircraft's flight path, with context indicating which sense is meant.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 船舶せんぱく、飛行機ひこうきが通過つうかした形跡けいせき。