USCG Exam PracticeTwin-screw vessel handling
Which of the following best describes the 'twist' maneuver on a twin-screw vessel?
- A. Both engines ahead at different RPM with the helm hard over
- ✓ One engine clutched ahead and the other clutched astern, helm amidships, with no way onCorrect
- C. Both engines astern with the helm alternated to control side force
- D. One engine ahead at full throttle while the other is in neutral
Why B is correct
§10-D describes rotating about the pivot point with the helm amidships and no way on, clutching one engine ahead and the other astern, which turns the boat with little or no advance and transfer. This is first practised at clutch speed in calm water.