The utility model discloses a be suitable for rotatory buoy tender that hangs of coastal energy -concerving and environment -protective type 10t in guangdong, it uses performance and efficiency to be dual core to advanced design theory and optimization technique are the guidance, by mathematic model optimizing and the experimental definite hull leading features that combines together of verifying of physical model, include principal dimension, molded lines, general arrangement, advancing device and attach the body etc. The utility model discloses the realization reaches or even surpasses the navigation performance (rapidity) and working property (the ability of lifting by crane, stability, seakeeping etc. ) of yardstick ship type of the same type great with the non -standard ship type of small scale, simultaneously, because new ship type yardstick is less, both accorded with in the coastal waterway of guangdong the environmental quality of navigation and operation, only needs to be equipped with the host computer of smaller power again, and required energy consumption all is less than conventional ship type with discharging, has demonstrated fully the scientific development spirit of " green, energy saving and emission reduction ".