问题描述：
[单选]
On a twin-screw，twin-rudder vessel，the most effective way to turn in your own water，with no way on，is to put（）．
A．one engine ahead and one engine astern，with full rudder
B．one engine ahead and one engine astern，with rudders amidships
C．both engines ahead，with full rudder
D．both engines astern，with full rudder
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答案解析：无
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