<p>Crew transfer vessels (CTVs) play an important roles in the operation and the maintenance of offshore wind facilities. When engineers need to transfer to offshore wind facilities for various tasks at sea sites, in most cases, the CTV navigator pushes the bow of the vessel against the offshore wind tower. In this operation, motion different from that of conventional wave-induced dynamics could occur because of noncontinuous static/dynamic friction at the contact points between the bow of the CTV and the offshore wind tower. The complex dynamics that occur during transfer operations can have serious impacts on the operability of offshore wind projects. Wind and waves impact on the dynamics of the CTV in the transfer operation. However, in previous studies, wind loads on the CTV during transfer operations were not considered because of model simplification. Therefore, in this paper, we applied model experiments in waves and numerical methods to investigate the dynamics of CTV pushing the bow against an offshore wind tower during transfer operations. To clarify the effect of steady winds on transfer performance, wind tunnel tests were conducted to measure the wind load on the CTV. Using the results of the wind loads, a numerical evaluation method for the dynamics in wind and waves was formulated using linear analysis (the frequency domain method). Next, we investigated the possibility of a constant wind velocity and bollard pushing force of the CTV resulting in the stick/slip phenomenon. We also investigated the availability of the transfer operation in the case of Japanese promoting zones in terms of offshore wind via the numerical method.</p>