Abstract: Provided are a control system and a control method for cranes which, by reducing the distortion of a structural member, are capable of shortening the time necessary for correcting positional deviations and directional deviations resulting from the distortion, thereby improving the efficiency of cargo handling work. A control system includes receivers and a control device and is configured in such a way that the control device adjusts the speed of each of paired propelling devices based on the coordinates of positions determined by the receivers to perform control to decrease the change in relative positions between the receivers in plan view.

Abstract: The honeycomb catalyst structure to be used for exhaust gas of a marine engine includes an SCR catalyst supported on a metal honeycomb unit having a shape divided by cell walls into a plurality of cells extending from one end face to the other end face. The SCR catalyst contains TiO2 alone, or contains TiO2 as a principal component and any one type or two or more types of V2O5, WO3, MoO3, SiO2, and Al2O3 in combination. The cell density of the plurality cells is 100 to 500 cpsi, and the slope of a straight line represented by a relationship between the flow velocity and the pressure loss of the exhaust gas passing through the cells is 30 or more and 180 or less.