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* Professor, Division of Maritime Transportation System, Mokpo National Maritime University, Mokpo 530-729, Korea**, *** Professor, Training Center of Ship Operation, Korea Maritime University, Busan 606-791, Korea† Professor, Division of Navigation Science, Korea Maritime University, Busan 606-791, Korea   :          .        ,     .    ,         ,  AC-14  ASS   2∼2.5     .             . ,          ․ .  , AC-14    7∼10  , ASS    3 ,     3.5       .  : , , , , Abstract : Vessels on anchoring are sometimes dragged due to the increased external forces. For preventing the dragging, it is required to enhance the holding power of the anchor. The holding power depends on the type and weight of the anchor and the seabed condition. Especially, the holding power of AC-14 type anchor is known to be 2∼2.5 times bigger than that of ASS type anchor. However, these coefficients was determined nearly by the result of the model test, so there is a need to verify that by sea trial. Therefore actual dragging case was analyzed and then compared with the coefficients in use, it was found that the two of them are much alike. Key words :Anchoring, external forces, dragging, holding power, holding power coefficient †: , kong@hhu.ac.kr 051)410-4273 * : , hyon@hhu.ac.kr 061)240-7182 ** , lys@hhu.ac.kr 051)410-4204 *** , kjsung@hhu.ac.kr 051)410-4471

A Study on the Holding Power Coefficient of AC-14 type and ASS type Anchor in Actual Ships