Statoil awards Mariner helicopter contract to CHC UK Statoil (STO) awarded the helicopter transportation contract for the Mariner field to CHC Helicopter (HELI) in the UK. The contract calls for CHC to operate two Sikorsky S-92 aircraft on behalf of Statoil. The helicopters will fly from Aberdeen or Sumburgh on the Shetland Isles to the Statoil operated Mariner field, 250 kilometers off the northeastern coast of Scotland. The contract has a duration of five years, plus an extension option for up to three years. The service is anticipated to begin in mid-2016.