ENG / MOHAMED WALID ABD ELHAMID AHMED REFAE is currently working as the head of engineering training department in the Sea Training Institute (Arab Academy for Science, Technology and Maritime Transport) since JAN 2013. He is a chief engineer that worked as a second engineer and chief engineer onboard in different types of vessels and he obtained his Master Degree in marine engineering from the AASTMT, Egypt (2012). Since 2007 he has been an engineering Lecturer in AASTMT teaching marine engineer, marine diesel, control, watch keeping and marine safety. He also published many papers in the field marine engineering technology & how to reduce the marine pollution. Email:Mohamed_walid5@yahoo.com