Abstract
Abstract − One of the primary purposes of tugs is for the towing of other ships in salvage operations. In orderto conduct such a task safely, the tug should be capable of generating the appropriate towing forces. Thereforethe prediction of resistance against a towed ship during towing operation is a very important and essential pro-cedure. This paper studies the ship resistance calculation program to predict towing force. The calculation pro-gram consists of the functions that calculate basic hull resistance in calm water, added resistance due to wind,drifting, hull roughness, waves, shallow water and currents. All predictions are calculated by statistical andempirical methods by graph or formula. The calculation results made by this program are compared with theresults from the U.S. Navy’s Towing Manual. These results confirm that this computer program is quite capableof appropriately predicting the resistance of damaged ships.Keywords: Salvage(구난), Towing Force(예인력), Prediction(추정), Hull Resistance(선체저항), Addedresistance(부가저항 ), Speed Loss(선속 감소)
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