Abstract
Measure should be taken for protection of workers against wind and splash of sea water in working environment at sea. Rainwear has been used widely as working suit in marine environment irrespective of the weather conditions such as rain falls and atomospheric temperature. The rainwears gives protection against wind, cold temperature and dirt to marine workers. In this study, firstly, fact-finding on working suit for fishermen in marine environment has been taken, and effectiveness on heat keeping of rainwear which is the most popular working suit for fishermen has been pointed out by some experiments. Secondary, in order to make thermal index of working suit which is applicable to marine environment, co-relation between critical temperature of working environment and wind velocity is considered on each thermal resistance of working suit using thermal equilibrium equation of human body. And also, effectiveness of wind deflector is studied in term of critical temperature of working environment.
