This record describes data from the The Proton Transfer Reaction Mass Spectrometer (PTR-MS) collected on the Marine National Facility RV Investigator Event voyage IN2015_E01. This was a trial voyage for the RV Investigator departing Hobart on the 29th January and returning to Hobart on the 18th of February, 2015. The Proton Transfer Reaction Mass Spectrometer (PTR-MS) is an online instrument which measures a wide range of atmospheric volatile organic compounds (VOCs) in real time, including dimethyl sulphide, isoprene, monoterpenes and a range of oxygenated VOCs.