A、Towing operations
B、Rigid coupled towing
C、Close coupled towing
D、Hard coupled towing
更多“A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines（）.”相关的问题
A、one-half the SWL of the main towing hawser B、three-fourths the SWL of the main towing hawser C、that of the main towing hawser D、twice that of the main towing hawser
A、A.insure that the hawser leads directly aft as it passes over the stern of the towing vessel B、B.increase the stability of the towing vessel by raising the hawser off the deck C、C.reduce chafing of the towing hawser D、D.prevent fouling of the hawser on deck gear located on the stern of the towing vessel
A、acts as a reserve length of towing hawser when the tug applies more power，and it dampens the surge effect of the tow B、gives an approximation of the amount of strain on the towing hawser C、is the dip in the towing hawser between the tug and the tow D、All of the above
A、increase the towing hawser's catenary and provide more spring B、reduce catenary，allow operation in shallower water，and to release one barge without breaking up the entire tow C、enable one tug and its crew without any outside assistance to make up or break down the tow D、provide rapid delivery of logs from the northwestern United States to Hawaiian sawmills
A、it is overtaken by the tow B、it is pulled sideways by the tow C、the weight of the towing hawser causes loss of maneuverability D、the propeller is fouled by the towing hawser
A、increase control of the tow B、prevent the towing vessel from going in irons C、make the towing vessel less maneuverable D、reduce shock stress on the towing hawser
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