... special survey to hull and machinery for class ABS*A1 Circle E as a "tug/seaport tug" for towing service Unrestricted ... are : Oil / Chemical Tanker, 3600HP 28m full-rotary tugboat, 3600HP 29.5m tugboat, 3200HP 26m full-rotary tugboat, 1000HP 16m Tugboat, 34m ... crane ship, multi-function working boat, Auto boat, etc. 26m full rotary tug