The studies on amenity-oriented port structures are being conducted as one of the special projects at PHRI from 1990. This is the third report of the project and discusses the carriage of a person on breakwater into the sea caused by overtopping waves. A series of model tests on the carriage of a person into the sea are conducted in a long wave channel. The major conclusion are as follows;
1)The person's carriage into the sea is that the maximum water elevation above the handrails is over 17 percentage of person's height.
2)A simple formula is developed to describe quantitatively the critical wave crest height and wave height to carry a person into the sea.It was found that caisson handrails can effectively prevent this accident i.e., with handrails, the critical wave crest to carry a person into the sea is 2.1m, whereas only 0.7m without them.