In the previous paper, characteristics of snap loading were studied by the experimental and theoretical investigations on vertically taut moored platforms subjected to regular waves. Since then, the wave exciting tests on vertically or splayed taut moored platform models have been conducted to clarify the more general dynamic characteristics. In this paper, the characteristics on motions of the platforms and the wire tensions are discussed from the comparison of the experimental results with the theoretical linear frequency domain analyses on the models mentioned above. As a consequence of this discussion, possibility of occurence of several kinds of remarkable nonlinear responses besides snap loading are pointed out, which are quite different from ones obtained from the linear frequency domain analyses. These are considered to be divided into three kinds : nonlinearities at primary resonance, sub-harmonic resonance and super-harmonic resonance. Some considerations are finally given for the approximate estimations of these nonlinear responses.