Abstract: Objective To investigete the status of diet nutrition and physical health on naval vessel personnel during and after navigation.Methods The survey procedures included a fou-rday weighted diet record,twenty-four-hour energy expenditure and anthropometric measurements(body height,body weight,arm muscle circumference,triceps skinfold and subscapular skinfold).Results Daily energy intakes for naval vessel perso nnel met the RDA for the army,but were a little more than that of energy expenditure.The evaluation of armmuscle circumference was 95.5 and 95.2 percent of normal evaluation respectively,so it indicated protein storage was good.Conclusions Moderately reducingenergy and fat supplementation,increasing the intake of vitamin,increasing calcium intake to make the ratio of calcium and phosphate reach to 1:1~1.5 are suggested.