The dynamic wave forces and moment on the centre of a quarry stone irregular shape armour unit model at the upstream tip, downstream tip, and middle of the crest of a homogeneous submerged breakwater are investigated experimentally under breaking wave conditions with various wave periods, wave heights, submergence, and exposures. A total of 6 cases containing 216 tests are carried out for this study. Direct measurements of simultaneous uplift and longitudinal wave forces on the model are conducted utilizing a wire-pulley system dynamometer. Two load cells are used in the dynamometer to measure the uplift forces and moment, and one load cell to measure the longitudinal force. The effects of submergence and relative water depth to wave height on the uplift and longitudinal forces are analyzed, and the results are presented in dimensionless form.;The maximum uplift and longitudinal forces on the model in each location are found under the same submergence and wave period. The magnitude and direction of the dynamic total force on the armour unit in each location are studied based on those maximum uplift and longitudinal forces. The results are presented in a dimensionless polar coordinate system.
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