"Flirt Mouette" (seagull) RABe 523 # 506, # 507 and # 511 of the SBB in multiple control are running the Interregio 2063 of the line IR 36 from Basel via Rheinfelden-Frick-Brugg AG-Baden-Dietikon-Zürich to Zürich Airport, between Frick and Hornussen.