The training booklet on the immersion suits. The authors of the document have provided detailed and easily understandable explanation of the importance of having all crew members duly trained in using immersion suits, when the suits shall be used, what are the main types of the suits and what their working principle is, when and how immersion suits shall be put on.
The content of the booklet also tells readers about using immersion suits in an emergency and provides the information and instructions on their storage and periodical maintenance. The publication also contains excerpts from the relevant regulatory documents and real life case studies of evacuations where people could not survive due to the lack of immersion suits or because of the poor training.
The main difference between lifejackets and immersion suits is that while lifejackets can only provide you with some buoyancy, immersion suits will help to save your life in cold water since they are originally designed to provide protection against the elements. The cover the whole human body except the face and don't let sea water in. They are commonly made of synthetic materials keeping the human body warm. We would also recommend you to watch the associated training video.