Jan 4, 2002 This course also covers an introduction to other marine communications. Students qualify to test for the International Yacht Training (IYT) VHF. International Yacht Training (IYT) is a globally recognized power and sail training The IYT VHF Radio Marine Communications course is designed to ensure. This course is designed to take a candidate from having no powerboat The IYT VHF Radio Marine Communications course is designed to ensure a thorough. Knowing what to do in high-pressure situations is crucial. IYT's commercial courses give students the skills required to react in police and rescue situations.