USCG Exam PracticeTwin-screw vessel handling
A coxswain on a twin-screw inboard vessel wants to rotate the vessel 180° in the smallest possible area. Which combination of conditions, as described in the source material, is most important to establish before beginning the maneuver?
- A. Full rudder deflection to one side with both engines ahead at moderate RPM
- B. Maximum RPM on both engines to generate maximum discharge current across the rudder
- C. Sternway established first so the pivot point shifts aft before splitting the throttles
- ✓ Helm amidships, no way on, and engines at clutch speed in calm waterCorrect
Why D is correct
§10-D specifies that rotating about the pivot point is a low-speed maneuver, first practised at clutch speed in calm water with the helm amidships and no way on. High RPM, full rudder, or pre-established sternway are not described as prerequisites for this maneuver.