A complete high level gamma spectrometry training course suitable for anyone intending to use gamma spectrometry for radiometric measurements for nuclear or environmental monitoring. Based on the existing off-line Nuclear Training Services Ltd. 3 Day Practical Gamma-Ray Spectrometry Course. The practical aspect is achieved using the NTS CompAct Virtual Gamma Spectrometer allowing real-time statistically valid measurement of virtual samples. The tutor is Dr Gordon Gilmore, co-author of 'Practical Gamma-Ray Spectrometry' and author of the 'Practical Gamma-Ray Spectrometry - Second Edition