This paper reports the results of the model test on the external forces between the pusher and the barge generated by wave and ship motion and also reports the ship motion on the wave.
　The maximum vertical force on the connection of the pusher and the barge is approx. 33.0kg (which is approx. 444.0tin actual ship), and maximum horizontal force is approx. 5.0kg (Which is approx. 67.2t in actual ship).
　The maximum pitching angle is ±3.0°under λ/L=1.5 and wave height H=18.0cm. The maximum heaving is ±8.0 cm under λ/L=0.6 and wave height H=18.0cm.