HS1, or High Speed 1, is the high-speed Channel Tunnel Rail Link running south from London to the tunnel between England and France. HS1 or HS-1 may also refer to: Transport HS1, Formula One racing car built by the German team ATS HS-1, designation of the Fox Chase Rapid Transit Line, an experimental rail line in Pennsylvania HS-1, a variant of the Mrigasheer, a glider built by the Indian Civil Aviation Department Military Curtiss HS-1, a US Navy flying boat of World War I HS-1, a former US Navy helicopter squadron known as the Seahorses, inactivated in 1997 Science and technology HS1, a Hypersonic Gun tunnel at Imperial College, London, part of the UK's National Wind Tunnel Facility HS1, an electrical stunning system produced by British company Ace Aquatec, used to ensure fish welfare at slaughter HS1, a multimedia headset manufactured by US company Plantronics HS1, a headset microphone manufactured by Australian company Røde Microphones HS1, a designation for a type of automotive light bulb for motorcycles HS-1, designation of one of the plutonium-gallium hemispheres used for the core in the first nuclear test detonation, codenamed Trinity HS-1, a model of the Weisscam digital high-speed camera, manufactured by German company P+S Technik HS-1, or Heteroscorpine, a polypeptide belonging to the Scorpine toxin family HS-1, or Hymenistatin, a cyclic peptide Other HS1, a part of the British HS postcode area