Presented by: John Prousalidis, National Technical University of Athens, Norbert Doerry, Naval Surface Warfare Center, Mohammed (Moni) Islam, This webinar: Intends to clearly distinguish among the terms of power system grounding, common mode grounding, and protective earthing by providing illustrative schematics enriched with comments based on the long experience of the presenters. Presenter bios: John Prousalidis is a Professor at the School of Naval Architecture & Marine Engineering of the National Technical University of Athens, Greece dealing with marine electrical engineering issues. He is vice-chairman of PES/MSCC and chairman of the ICA-22-13 “Sustainable Maritime”. Norbert Doerry is an engineer working for the Naval Surface Warfare Center Carderock Division, Code 823, Ship and Submarine Design Software Branch. Previously, he served for over eleven years as the Technical Director of the NAVSEA SEA 05 Technology Office and 26 years as a naval officer; he retired from the U.S. Navy as an Engineering Duty Officer with the rank of Captain. He is an active member of IEEE, SNAME, and ASNE and is currently chair of the IEEE P45.1 and P45.3 working groups. Mohammed (Moni) Islam is a retired shipboard power system design and development engineer. Expert consultant of shipboard electric propulsion power system design and development. Past Chair of IEEE 45 Standard development. Present Chair of IEEE 45.7 Switchboard Standard development.