The improved type D (semicircle) rubber fender is developed on the basis of type D fender. The original type D fender is anchored in the middle. That leads to the break away of the fender. The steel panel in the improved Type D fender is built-in and is double anchored. Further more, the anchoring bolt is bigger than the common. As a result, the anchoring grip is double to the Type D fender. It has been proved by fact that this product meets requirement for design and is widely appreciated by both designer and clients.

1. The improved Type D fender could be equipped both at the smaller and at the top front of the harbor as the second defense line together with the other fenders. Normally, it should be equipped continuously so as to avoid the direct impact by the ships when abnormal harboring happens.